Remove Language and Input duplicates

Change the keys in the Language and Input screen for the
gesture and tts-output settings so they can be disabled
in search. Then change the preference controllers to take
a key as input to avoid crashes on the other screens with
these settings.

Merge for: ag/2098173/

Test: make RunSettingsRoboTests
Bug: 33701673
Change-Id: I8bc0776131fcac5a6edf7e8271bc53252c2fc719

tests/robotests/src/com/android/settings/gestures/PIckupGesturePreferenceControllerTest.java

@@ -47,11 +47,13 @@ public class PIckupGesturePreferenceControllerTest {
 
     private PickupGesturePreferenceController mController;
 
+    private static final String KEY_PICK_UP = "gesture_pick_up";
+
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
         mController = new PickupGesturePreferenceController(
-                mContext, null, mAmbientDisplayConfiguration, 0);
+                mContext, null, mAmbientDisplayConfiguration, 0, KEY_PICK_UP);
     }
 
     @Test