Add manifest-merger 30.1.0-alpha06 am: 99626c9a6c

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/manifest-merger/+/15600270

Change-Id: I6a303b3c68bd91c3fae1d8cd3b7c4e1b4861a553
tree: f44672b3268bf2c3b001cea1ab4113accc236bb3
  1. com/
  2. Android.bp
  3. import-maven-artifacts.sh