Preserve Xposed Framework Files

This will Preserve Xposed Framework Files (/system/bin/app_process) while installing so that users don't have to reinstall it everytime they flash a nightly.

PS2: Fixed White Spaces

Change-Id: I848646390cc87834ad75a73709c0cf6046e00ce4
Add Trebuchet dpi

Change-Id: I8956c5c66cd3831a713c6cff7b198a1008071623