Add support for MODULES_BUILD_FROM_SOURCE for consistency with am: ccb5c382df am: 81db63766f

Original change: https://android-review.googlesource.com/c/platform/prebuilts/module_sdk/Scheduling/+/1907938

Change-Id: Ibc17f16f8900ed0c7605b98839983a204d4a392e
tree: 904f0f86afccd647702fa209e22a0e8baa7b7ff8
  1. .prebuilt_info/
  2. 1/
  3. current/
  4. OWNERS