[FIXED] Add installer persistence support

Change-Id: I2d3f0bcdcb76911133ff54f7e94ee7daf3373f35
Signed-off-by: Arnav Gupta <championswimmer@aokp.co>
Merge "[FIXED] Add installer persistence support" into kitkat
Merge branch 'kitkat' of https://github.com/AOKP/build into kitkat