Add OkHttp to the platform.

Change-Id: I18716683632249573295cb2eb5229a1188ed0f17
Duplicate libgcc.a in front of *so

Also see 6c7bc550adb917157a9f53ebf8898110e37294b2

Change-Id: Iade6cd6b40cd4840a148098e1d8fc7a0c97e2f66
Run zipalign after classes.dex is removed from the apk

If LOCAL_DEX_PREOPT is enabled.

Change-Id: Ie2a706fbb77bc31c9fdb01c8435819c5de97ea28