Update build-tools to ab/6909298 am: f0d7697ad5 am: 617543557f am: 763009dfb1 am: 928886452b

Original change: https://android-review.googlesource.com/c/platform/prebuilts/build-tools/+/1463263

Change-Id: I035a2704d4c511533d7d5e3e88d5f25abe1ca24d