Bug 1147265 - Add filterTouches... to sync activities. r=mhaigh

All old sync activities inherit from SyncTheme, which inherits from Gecko on
API < 11 and Gecko.Dialog -> GeckoBaseDialog on v11+.

All fxaccount activities inherit from FxAccountTheme, which inherits from
Gecko.

Note that I don't have an old sync account so I did not test that behavior.

--HG--
extra : commitid : DVKwxCuJytk
extra : rebase_source : a3760c72f1659bc2c146e84e1e405aa80047b6a0

mobile/android/base/resources/values/themes.xml

@@ -26,6 +26,7 @@
     <style name="GeckoDialogBase" parent="@android:style/Theme.Dialog">
         <item name="android:windowNoTitle">true</item>
         <item name="android:windowContentOverlay">@null</item>
+        <item name="android:filterTouchesWhenObscured">true</item>
     </style>
 
     <style name="GeckoTitleDialogBase" parent="@android:style/Theme.Dialog" />
@@ -39,6 +40,8 @@
         to a particular API level can go here.
     -->
     <style name="Gecko" parent="GeckoBase">
+        <item name="android:filterTouchesWhenObscured">true</item>
+
         <!-- Default colors -->
         <item name="android:textColorPrimary">@color/primary_text</item>
         <item name="android:textColorSecondary">@color/secondary_text</item>