msm7x27a-common: update max background apps prop

Change-Id: Idbf0dfe685179de19b694628a55c1014200fa51a
Merge branch 'cm-10.2' of github.com:TeamHackLG/android_device_lge_msm7x27a-common into cm-10.2
msm7x27a-coomon: fix torch app

Change-Id: I6dd6b01967e01d22603d359be9835787730425e0