Memory leak: parseObbFile.footer

Change-Id: Ia9e005e63fad7ab364f6c2c80cb98ec98f89b470
Signed-off-by: You Kim <you.kim72@gmail.com>
fb: fix google observer derp

the way it was it does not detect any observer change on the
immsersive value. Fixed it by settings it to Secure completly

Change-Id: If8cf887650668e2399367e09614e91cc30b7f70b
change default for unknown sources & verify apps

Change-Id: I04467c0c1ef3985b416f6e58013ddc3ce4137712