System/core: Start qrng daemon upon power up

1. Set root permissions to qrng daemon upon powerup
2. Drop all permissions except few, just enough to make ioctl calls

Permission for hardware random device is changed in
this gerrit (part of Point 1(above))

Change-Id: Ibf58b7212ba1ec532de9d461266081f3ac4395e3
Signed-off-by: Hariprasad Dhalinarasimha <hnamgund@codeaurora.org>
audio: Unhide MP2/WMA enums

Change-Id: Id7dd73ef35776fda1f753987856759d34fb541f6
ADB: Don't force -O2 if something else is provided instead.
C++11 fixes.

Conflicts:
	libutils/Unicode.cpp

Change-Id: I5edd3fa1b5982dc7bbc366744232f2c647e2255a
C++11 literal fixes.