Revert "adb: configure /system file permission with fs_config"

This reverts commit 8e79ab24aad6943ebc4d9f345bfa168537f4d2fb.

Change-Id: I6ba3564de51c63834a8bc72c9e3c50be3d26c655
Merge "Revert "adb: configure /system file permission with fs_config"" into android-4.4
Merge remote-tracking branch 'omni/android-4.4' into android-4.4