Fix AIDL lazy camera HAL startup.

AServiceManager_getService() won't start a service if it isn't already
running.

Bug: 285546208

Test: Vendor testing
Test: Kill camera provider process, make sure it comes up again and
      cameraserver adds it

Change-Id: I1bfd2c2af29afa795caa074d4de38a8d2119ee12
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>