Merge "Build updatable-bcp-packages.txt from prebuilts in sdk snapshot" am:...

Merge "Build updatable-bcp-packages.txt from prebuilts in sdk snapshot" am: d2a23518 am: 3caa3a02 am: cc7fc33e

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1768127

Change-Id: I5c1f0ee8163de0899f785e7860159aef150c1c04