Fix process to disable stock recovery flashing

/system/etc/install-recovery.sh no longer exists on AOSP devices
so we will stop checking for it.

Change-Id: I9074dfc443371a27b909faa8f66998683cfb6171
Properly set tw_settings_path after decrypt on data media devices

When tw_settings_path is not set correctly for /data/media/0 when
present, custom themes will not load (and who knows what else may
also be broken) so set it properly after decrypting the device.

Change-Id: Id3dff04f62cf9c953c8a2ca07fe9ac597dcda20f
Clean Spec
Support f2fs in update script
Version Description
Fix Background
Fix ext4