Add isSliceable API to BasePrefController

Only support explicitly approved Settings Slices,
dictated by controllers which return true for the new
method isSliceable.

Updating the supported settings to a whitelist means that
the method to return all available slices must be updated,
and checking slicability when we index slices.

Test: robotests
Change-Id: I85848c2cdf3e151fa94b33dd1dc5c0374ef94b5b
Merged-In: Ib2b9690cdd0036b5cc4a1cb846c52bce7c824ab9
Fixes: 79779103

src/com/android/settings/gestures/DoubleTapPowerPreferenceController.java

@@ -23,6 +23,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.provider.Settings;
 import android.support.annotation.VisibleForTesting;
+import android.text.TextUtils;
 
 import com.android.settings.R;
 import com.android.settings.search.DatabaseIndexingUtils;
@@ -61,6 +62,11 @@ public class DoubleTapPowerPreferenceController extends GesturePreferenceControl
         return isGestureAvailable(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), "gesture_double_tap_power");
+    }
+
     @Override
     protected String getVideoPrefKey() {
         return PREF_KEY_VIDEO;

src/com/android/settings/gestures/DoubleTapScreenPreferenceController.java

@@ -89,6 +89,11 @@ public class DoubleTapScreenPreferenceController extends GesturePreferenceContro
         return AVAILABLE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), "gesture_double_tap_screen");
+    }
+
     @Override
     public boolean setChecked(boolean isChecked) {
         return Settings.Secure.putInt(mContext.getContentResolver(), SECURE_KEY,

src/com/android/settings/gestures/DoubleTwistPreferenceController.java

@@ -71,6 +71,11 @@ public class DoubleTwistPreferenceController extends GesturePreferenceController
         return isGestureAvailable(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), "gesture_double_twist");
+    }
+
     @Override
     protected String getVideoPrefKey() {
         return PREF_KEY_VIDEO;

src/com/android/settings/gestures/PickupGesturePreferenceController.java

@@ -83,6 +83,11 @@ public class PickupGesturePreferenceController extends GesturePreferenceControll
         return AVAILABLE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), "gesture_pick_up");
+    }
+
     @Override
     protected String getVideoPrefKey() {
         return PREF_KEY_VIDEO;

src/com/android/settings/gestures/SwipeToNotificationPreferenceController.java

@@ -21,6 +21,7 @@ import static android.provider.Settings.Secure.SYSTEM_NAVIGATION_KEYS_ENABLED;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.provider.Settings;
+import android.text.TextUtils;
 
 import com.android.settings.Utils;
 
@@ -59,6 +60,11 @@ public class SwipeToNotificationPreferenceController extends GesturePreferenceCo
         return isAvailable(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), "gesture_swipe_down_fingerprint");
+    }
+
     @Override
     public boolean setChecked(boolean isChecked) {
         setSwipeToNotification(mContext, isChecked);

src/com/android/settings/gestures/SwipeUpPreferenceController.java

@@ -23,6 +23,7 @@ import android.content.pm.PackageManager;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.support.annotation.VisibleForTesting;
+import android.text.TextUtils;
 
 import com.android.internal.R;
 
@@ -61,6 +62,11 @@ public class SwipeUpPreferenceController extends GesturePreferenceController {
         return isGestureAvailable(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
 
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), "gesture_swipe_up");
+    }
+
     @Override
     protected String getVideoPrefKey() {
         return PREF_KEY_VIDEO;