update SystemUI's proguard.flags

Change-Id: I5aa73eddd3fea6cddeddaf94e202d8de870e7df5
Add permission that allows cancelling notifications from other apps.

Change-Id: I055b17873e174f71174898a7649b1e221fd8c436
Custom Notification (1/3)

Change-Id: I679819fa09a9f71b64f0f84e9f795faaa2f0ab50
Facebook Sync Dirty Hack