Detect reverts to the app_process file after reboot

Several models have mechanisms that prevent changes to /system by restoring "stock" contents after a hard reboot.
This change detects situations where a successfully written app_process file is later found missing or replaced by a previous version. This applies not only to installation but also to uninstallation.
If such a mismatch is detected, a note is displayed suggesting the use of recovery (un)installation modes in case the change was not expected.
Move code for revert warning panel to onCreateView
Adjustment to aspect of revert warning panel
Rewording of revert warning messages
Merge branch 'det-reverts'

Conflicts:
	res/values/strings.xml