[Refactor] Include edgetpu targets in final image

Make the EdgeTPU targets defined in <soc>/proprietary visible by product packages included in edgetpu.mk.

Bug: 323601370

Tested:
No functionality change. Edgetpu services still work.

Change-Id: Ib3835ee3976dcfa86df999d0a32398bf8ec9a2cb
1 file changed