Add writable data space for radio.

Storing carrier provisioning urls updates in /data/misc/radio.
bug:9623159

Change-Id: I8d62d4638229733dea0f11f1729c4d22ae2295d1
I36697ed341353b7a3dbec5afe20241102e76f6f1
init: Increase maximum number of Android properties to 372

Bug: 9941046 -- encryption failed
Change-Id: Ib9c2921a2b574542cce98d2eadbd9204a1ad0bf0
Signed-off-by: Iliyan Malchev <malchev@google.com>
Merge tag 'android-4.3_r3' into r3

Android 4.3 release 3.0