Always note the state of RNDIS from USB broadcasts.

Test: as follows
    - built
    - flashed
    - booted
    - runtest frameworks-net passes
Bug: 63970368

Merged-In: I53115deda25ca83a00bd9de12891a72028647d12
Merged-In: I317b694c3a8c76077c031c4410d5b97ed79c1bbc
Merged-In: Ie226534011d6439c24cfe1957c5cf47ba171b0c0
Change-Id: I273edbe21fea586f1353ff378515401efc6bb15e
(cherry picked from commit 3897dc17)