Add pre-built attribute to host module definition for fake snapshot. am:...

Add pre-built attribute to host module definition for fake snapshot. am: 9e5cc8a6 am: d7e3a124 am: 226b5f45

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2044967



Change-Id: I1cf825ac4998edfc3fb676f5965983a47da951d5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>