Check in prebuilt signapk.jar as of build #470905

The prebuilt sigapk.jar is With 147626e624ec0b709e6dc8f156ccb391fffef9c8
in the build project.
Switch to using prebuilt signapk.jar for unbundled builds.

Change-Id: Ib2954582d776f2105fa69b45048223b386c3b633
2 files changed