Merge tag 'android-9.0.0_r21' into lineage-16.0-android-9.0.0_r21

Android 9.0.0 release 21

* tag 'android-9.0.0_r21':
  Adding new intent ACTION_SMS_MMS_DB_CREATED.
  ActivityThread: purge jemalloc at appropriate times
  Add Missing XML files from 5282778 to fix build Bug:111603898 (cherry picked from commit 974a86e201e2fa17bad58d1fb2f83b7d21ed1580)
  Add configurable default setting for assistant componentname
  wm: recycle bitmaps immediately in TaskSnapshotPersister
  hwui: purge malloc pages on bitmap destruction
  Recover shady content:// paths.
  Keep app in high memory adjust if moving from TOP to FGS
  DO NOT MERGE: Reset launch start times when removing a process

Change-Id: Idf721b2452ddc6714df9f16eebc6cde850988533