Add SystemAsRoot = on to advancedFeatures.ini.
BUG: 69770927
Test: build sdk_gphone_x86-userdebug,
boot to home with tot emulator
Test: build sdk_phone_armv7-userdebug,
boot to home with tot emulator
Change-Id: I72bb3c1b9bb09293284765f63047ce82fb039cc0
Merged-In: I72bb3c1b9bb09293284765f63047ce82fb039cc0