SystemServer: Move sensor init to a new thread.

Move Sensor init to a separate thread so that it doesn't block the
critical booting path.

Initializing Sensors in separate thread has been seen to improve boot
time on customer devices with low-tier / ult chipsets(less cpu cores)

Change-Id: I5c46a5805c04ffe551019b4683523e3bf70274a2
Framework/base: Relocating GC calls at the end of loop during zygote init

Relocating explicit GC calls at the end of the loop during the preloading
the resources and preloading clases, with this changes boottime improved.

Change-Id: I2e05ef68578eddca8cd435b5186e198ee7d71739
CamcorderProfile: Add 4k DCI timelapse encoder constant

 4k encoder constant during timelapse is added
 for the 4k timelapse use case.

CRs-Fixed: 642013
Change-Id: I901fa362242477dad84130d23055815cdfee6167
security: prevent FDE after PFE

Full-Disk-Encryption (FDE) is not allowed
after Per-File-Encryption (PFE) is activated.

Change-Id: I17e6039f3b33450835fea6ee5e612c079868b71f
frameworks/base: No score update to 100 with wqe

When user explicitly selects an AP, the score of this AP will be
set to 100 and this has conflict with wqe. Disable this when wqe
is enabled

Change-Id: I57db8318a4421038d144bc41bd0ff5ae02d9edd3
AlarmMangerService: Fix the delay of ACTION_TIME_CHANGED for time-services

After boot completed, if low memory condition happens or some ordered
broadcasts have time out, it will cause delay for some receivers to
receive ordered broadcasts. Adding FLAG_RECEIVER_FOREGROUND into
time changed action will make TimeServiceBroadcastReceiver receive
ACTION_TIME_CHANGED in time.

CRs-Fixed: 630982
Change-Id: Id789d0b3c969af6b92f62612602ba119613382ab
Avoid overwriting SYSTEM_ADJ with PERSISTENT_PROC_ADJ

If an application running on system_process has a persistent flag,
the oom_adj value for system_process is unexpectedly overwritten
to PERSISTENT_PROC_ADJ (-12).

We must keep SYSTEM_ADJ (-16) for system_process.
This change guards against overwriting SYSTEM_ADJ with
PERSISTENT_PROC_ADJ

Change-Id: I8f334d93b82271f9a0cfbbef34a75af2dacb186b