msm8939: Don't push background services to higher adj

This is pushing SystemUI adj to 1000 and getting it killed
prematurely even when there's enough memory on the system.

TOMATOL-615

Change-Id: Id2ff693d97e1ea778b4b96921419410c37101f5c

system.prop

@@ -4,7 +4,6 @@ ro.sys.fw.dex2oat_thread_count=4
 
 # ActivityManager
 ro.config.max_starting_bg=8
-ro.sys.fw.bservice_enable=true
 ro.sys.fw.use_trim_settings=true
 
 # Audio