core: Fix permissions for data and cache

 - Add /data/radio
 - Set gateway property after DNS
 - Allow radio users to set properties associated with
   all rmnet interfaces. Not just rmnet0
 - Check Cache and Dalvik perm
 - Check selinux enforced booleans

Change-Id: Ia60fcb8f90aa73ffd40e839b93356ee50a9e5072
sdcard: fix usage for -w and -s options

Change-Id: I0ef4299d2ccf99a18970f02d4bd4e7c28dc5335e
adb: Fix backup fallback

 * Check for existence of binary first

Conflicts:
	adb/backup_service.c

Change-Id: I5c1884655ae031f51cb935221ae7870b016e259d