Add static preview images to gesture settings.

Set the animation preview image view to the newly added preview image
instead of loading it from animation video.

Test: manual - launch gesture settings and visually check the animation
preview images.

Bug: 31636637

Change-Id: If25a0e3501bea0c6343326a143d665ec79e3d7c7
diff --git a/res/xml/gesture_settings.xml b/res/xml/gesture_settings.xml
index af365bf..8954916 100644
--- a/res/xml/gesture_settings.xml
+++ b/res/xml/gesture_settings.xml
@@ -23,30 +23,35 @@
         android:key="gesture_swipe_down_fingerprint"
         android:title="@string/fingerprint_swipe_for_notifications_title"
         android:summary="@string/fingerprint_swipe_for_notifications_summary"
-        settings:animation="@raw/gesture_fingerprint_swipe"/>
+        settings:animation="@raw/gesture_fingerprint_swipe"
+        settings:preview="@drawable/gesture_fingerprint_swipe"/>
 
     <com.android.settings.gestures.GesturePreference
         android:key="gesture_double_tap_power"
         android:title="@string/double_tap_power_for_camera_title"
         android:summary="@string/double_tap_power_for_camera_summary"
-        settings:animation="@raw/gesture_double_tap"/>
+        settings:animation="@raw/gesture_double_tap"
+        settings:preview="@drawable/gesture_double_tap"/>
 
     <com.android.settings.gestures.GesturePreference
         android:key="gesture_double_twist"
         android:title="@string/double_twist_for_camera_mode_title"
         android:summary="@string/double_twist_for_camera_mode_summary"
-        settings:animation="@raw/gesture_twist"/>
+        settings:animation="@raw/gesture_twist"
+        settings:preview="@drawable/gesture_twist"/>
 
     <com.android.settings.gestures.GesturePreference
         android:key="gesture_double_tap_screen"
         android:title="@string/ambient_display_title"
         android:summary="@string/ambient_display_summary"
-        settings:animation="@raw/gesture_ambient_tap"/>
+        settings:animation="@raw/gesture_ambient_tap"
+        settings:preview="@drawable/gesture_ambient_tap"/>
 
     <com.android.settings.gestures.GesturePreference
         android:key="gesture_pick_up"
         android:title="@string/ambient_display_pickup_title"
         android:summary="@string/ambient_display_pickup_summary"
-        settings:animation="@raw/gesture_ambient_lift"/>
+        settings:animation="@raw/gesture_ambient_lift"
+        settings:preview="@drawable/gesture_ambient_lift"/>
 
 </PreferenceScreen>
\ No newline at end of file