Clean code,remove unneed

N/A

Change-Id: I33242f4974302d3c02db177b4a51d9d7425c1715
Signed-off-by: huangqiwu <huangqiwu@xiaomi.com>
init: Allow basic environment variable expansion in env assignment

Allow environment variable expansion in 'export' command if the
value begins with "${_var_}" (where "${_var_}" will be replaced
with the current value of environment variable _var_).  Expansion
will only occur one time.

e.g.
export BOOTCLASSPATH ${BOOTCLASSPATH}:/system/framework/abc.jar
(cherry picked from commit 7940299507f15055851a6e8b61ae8d8a7d7f3484)

Change-Id: If9e4adfa1aba2c7a4ca243978ced3c46c2cb4d73

Conflicts:
	init/init.c
audio: add EVRCWB EVRCB to supported audio formats

 compressed format should also include EVRCWB and EVRCB

 CRs-Fixed: 516138

Change-Id: I64f40d3380cb4fa055e0c3d79db3acf57929405c
system/core: Add support for EVRCNW audio format

This change is needed to support EVRCNW audio format.

Change-Id: I161c2c24ca764ed291f59d17d0a2be443818a7aa
init: Increase maximum number of Android properties to 496.

As more and more properties are created, 372 is not enough.

Change-Id: Iab793e9f6cf540551e9821f61c2aeee8fb6dafc3
CRs-fixed: 538187
fs_mgr: add support for "sync" mount flag

Change-Id: I6ad74cfbf98d30320785e3691df30dabc5c54cb9
ueventd: restorecon sysfs files

Allow cpufreq governor tuning files to be labelled correctly after
switching governor.

Change-Id: I3e0fd310aaacbb4e647e42597d38040774257955