Gallery: Editor: View full picture when applying filters

* Current behaviour: Edit picture (e.g. crop) -> top of pic is hidden by
  action bar
* New behaviour: Picture is fully visible

Test: manual
Fixes: https://gitlab.com/LineageOS/issues/android/issues/1435
Change-Id: I2aa2281e976622cdbd0145d3895c36e4b21bdc7d
diff --git a/res/layout/filtershow_activity.xml b/res/layout/filtershow_activity.xml
index 1c58e12..741b3db 100644
--- a/res/layout/filtershow_activity.xml
+++ b/res/layout/filtershow_activity.xml
@@ -24,7 +24,8 @@
         <FrameLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_weight="1" >
+            android:layout_weight="1"
+            android:layout_marginTop="?android:attr/actionBarSize" >
 
             <RelativeLayout
                 android:id="@+id/imageContainer"