Move 'OrphanedFormatString' to to the list of errors

'OrphanedFormatString' was only removed in
ERRORPRONE_WARNINGS_TO_TURN_OFF. It should be added
to ERRORPRONE_WARNINGS_TO_ERROR.
It is a follow-up to https://crrev.com/c/1134828.

Bug: 834796
Change-Id: I801d2514ec40c22ee48fdb44a0f6975ff892d8d8
Reviewed-on: https://chromium-review.googlesource.com/1144990Reviewed-by: Peter Wen <wnwen@chromium.org>
Commit-Queue: Amos Lim <eui-sang.lim@samsung.com>
Cr-Commit-Position: refs/heads/master@{#577355}

build/android/gyp/javac.py

@@ -96,6 +96,7 @@ ERRORPRONE_WARNINGS_TO_ERROR = [
   'MissingFail',
   'MissingOverride',
   'NarrowingCompoundAssignment',
+  'OrphanedFormatString',
   'ParameterName',
   'ParcelableCreator',
   'ReferenceEquality',