feat(gestures): add user-selectable sleep method preference (#6664)

Allow users to choose their preferred sleep method (Auto/Root/
Accessibility Service/Device Admin) for the double-tap-to-sleep
gesture, instead of relying on the fixed priority fallback chain.

This addresses the issue where OEM ROMs aggressively kill
accessibility services, making the sleep gesture unreliable on
non-rooted devices. Users can now explicitly select Device Admin
as an alternative that won't be killed by battery optimization.

Closes #6463

lawnchair/res/values/strings.xml

@@ -616,6 +616,12 @@
     <string name="generic_a11y_hint">To %1$s, turn on the Lawnchair accessibility service. Tap \"Open settings\", select \"Lawnchair\" and turn on \"Use Lawnchair.\"</string>
     <string name="generic_a11y_disclaimer">Lawnchair uses Accessibility\'s `performGlobalAction` method to perform this action. This is a sensitive permission that allows monitoring other apps. However, Lawnchair is not configured for that functionality and receives no events.</string>
 
+    <string name="sleep_mode_label">Sleep mode</string>
+    <string name="sleep_mode_auto">Automatic</string>
+    <string name="sleep_mode_root">Root</string>
+    <string name="sleep_mode_accessibility">Accessibility service</string>
+    <string name="sleep_mode_device_admin">Device admin</string>
+
     <!--
 
     Bug reporting

lawnchair/src/app/lawnchair/gestures/handlers/SleepGestureHandler.kt

@@ -25,16 +25,31 @@ import android.content.Context
 import android.content.Intent
 import android.os.Build
 import app.lawnchair.LawnchairLauncher
+import app.lawnchair.preferences2.PreferenceManager2
 import app.lawnchair.util.requireSystemService
 import app.lawnchair.views.ComposeBottomSheet
 import com.android.launcher3.R
 import com.android.launcher3.Utilities
 import com.topjohnwu.superuser.Shell
+import kotlinx.coroutines.flow.first
 
 class SleepGestureHandler(context: Context) : GestureHandler(context) {
 
     override suspend fun onTrigger(launcher: LawnchairLauncher) {
-        methods.first { it.isSupported() }.sleep(launcher)
+        val pref = PreferenceManager2.getInstance(context).sleepMode.get().first()
+        val method = when (pref) {
+            SleepMode.AUTO -> methods.first { it.isSupported() }
+            SleepMode.ROOT -> methods.filterIsInstance<SleepMethodRoot>().first()
+            SleepMode.ACCESSIBILITY -> methods.filterIsInstance<SleepMethodPieAccessibility>().first()
+            SleepMode.DEVICE_ADMIN -> methods.filterIsInstance<SleepMethodDeviceAdmin>().first()
+        }
+
+        if (pref != SleepMode.AUTO && !method.isSupported()) {
+            methods.first { it.isSupported() }.sleep(launcher)
+            return
+        }
+
+        method.sleep(launcher)
     }
 
     private val methods = listOf(

lawnchair/src/app/lawnchair/gestures/handlers/SleepMode.kt

@@ -0,0 +1,34 @@
+package app.lawnchair.gestures.handlers
+
+import androidx.annotation.StringRes
+import androidx.compose.ui.res.stringResource
+import app.lawnchair.ui.preferences.components.controls.ListPreferenceEntry
+import com.android.launcher3.R
+
+enum class SleepMode(
+    @StringRes val labelResourceId: Int,
+) {
+    AUTO(
+        labelResourceId = R.string.sleep_mode_auto,
+    ),
+    ROOT(
+        labelResourceId = R.string.sleep_mode_root,
+    ),
+    ACCESSIBILITY(
+        labelResourceId = R.string.sleep_mode_accessibility,
+    ),
+    DEVICE_ADMIN(
+        labelResourceId = R.string.sleep_mode_device_admin,
+    ),
+    ;
+
+    companion object {
+        fun values() = enumValues<SleepMode>().toList()
+
+        fun fromString(string: String) = values().firstOrNull { it.toString() == string }
+
+        fun entries(): List<ListPreferenceEntry<SleepMode>> = values().map {
+            ListPreferenceEntry(value = it) { stringResource(id = it.labelResourceId) }
+        }
+    }
+}

lawnchair/src/app/lawnchair/preferences2/PreferenceManager2.kt

@@ -31,6 +31,7 @@ import androidx.datastore.preferences.preferencesDataStore
 import app.lawnchair.data.Converters
 import app.lawnchair.font.FontCache
 import app.lawnchair.gestures.config.GestureHandlerConfig
+import app.lawnchair.gestures.handlers.SleepMode
 import app.lawnchair.gestures.type.GestureType
 import app.lawnchair.hotseat.HotseatMode
 import app.lawnchair.icons.CustomAdaptiveIconDrawable
@@ -747,6 +748,13 @@ class PreferenceManager2 @Inject constructor(
         defaultValue = GestureHandlerConfig.Sleep,
     )
 
+    val sleepMode = preference(
+        key = stringPreferencesKey(name = "sleep_mode"),
+        defaultValue = SleepMode.AUTO,
+        parse = { SleepMode.fromString(it) ?: SleepMode.AUTO },
+        save = { it.toString() },
+    )
+
     val swipeUpGestureHandler = serializablePreference<GestureHandlerConfig>(
         key = stringPreferencesKey("swipe_up_gesture_handler"),
         defaultValue = GestureHandlerConfig.OpenAppDrawer,

lawnchair/src/app/lawnchair/ui/preferences/destinations/GesturePreferences.kt

@@ -3,10 +3,12 @@ package app.lawnchair.ui.preferences.destinations
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import app.lawnchair.gestures.handlers.SleepMode
 import app.lawnchair.preferences.getAdapter
 import app.lawnchair.preferences2.preferenceManager2
 import app.lawnchair.ui.preferences.LocalIsExpandedScreen
 import app.lawnchair.ui.preferences.components.GestureHandlerPreference
+import app.lawnchair.ui.preferences.components.controls.ListPreference
 import app.lawnchair.ui.preferences.components.layout.PreferenceGroup
 import app.lawnchair.ui.preferences.components.layout.PreferenceLayout
 import com.android.launcher3.R
@@ -65,5 +67,14 @@ fun GesturePreferences(
                 )
             }
         }
+        PreferenceGroup(heading = stringResource(id = R.string.sleep_mode_label)) {
+            Item {
+                ListPreference(
+                    adapter = prefs.sleepMode.getAdapter(),
+                    entries = SleepMode.entries(),
+                    label = stringResource(id = R.string.sleep_mode_label),
+                )
+            }
+        }
     }
 }