Avoid crash when menu button is pressed on 4.1 LG devices

According to https://code.google.com/p/android/issues/detail?id=78154 this
is a common issue on LG devices with 4.1 and appcompat-v7, version 21.0.0
through at least 21.0.2. Apparently, this did not happen with older
versions of appcompat-v7 (before 21).
Same workaround is on
http://stackoverflow.com/questions/26833242/nullpointerexception-phonewindowonkeyuppanel1002-main

Consider removing the workaround when updating appcompat-v7.

Bug: T78117
Change-Id: I381cfe39f0d370fa20c968ae86ffda0f04be409f
Merge "Avoid crash when menu button is pressed on 4.1 LG devices"