Enable the edge-to-edge display (#4003)

https://developer.android.com/develop/ui/views/layout/edge-to-edge#enable-edge-to-edge-display

lawnchair/src/app/lawnchair/BlankActivity.kt

@@ -7,6 +7,7 @@ import android.os.Handler
 import android.os.Looper
 import android.os.ResultReceiver
 import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
 import androidx.activity.result.ActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
@@ -20,7 +21,6 @@ import androidx.compose.material3.Text
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.core.os.bundleOf
-import androidx.core.view.WindowCompat
 import app.lawnchair.ui.preferences.components.layout.SystemUi
 import app.lawnchair.ui.theme.LawnchairTheme
 import app.lawnchair.util.unsafeLazy
@@ -36,7 +36,7 @@ class BlankActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        WindowCompat.setDecorFitsSystemWindows(window, false)
+        enableEdgeToEdge()
         if (!intent.hasExtra("dialogTitle")) {
             startTargetActivity()
             return

lawnchair/src/app/lawnchair/ui/preferences/PreferenceActivity.kt

@@ -20,15 +20,15 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.net.toUri
-import androidx.core.view.WindowCompat
 import app.lawnchair.ui.theme.LawnchairTheme
 
 class PreferenceActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        WindowCompat.setDecorFitsSystemWindows(window, false)
+        enableEdgeToEdge()
         setContent {
             LawnchairTheme {
                 Preferences()