Do not set up a compilation classpath for AndroidSdk when nothing will am: ad6c83036e

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/vogar/+/18604031

Change-Id: I6f8d91024785a98a6706b1e1a3022b6a5fbe9283
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>