Add LOCAL_FULL_INIT_RC to handle init_rc full path

Soong supports references to other modules for init_rc property, so full
paths need to be passed from Soong to make rather than module local
paths.

Test: m droid dist
Bug: 184567830
Change-Id: Ib1873a3418830f5cbf32e26f55d3ad0ab0d9c9c5