Add manifest-merger 30.1.0-alpha06 am: 99626c9a6c am: 799d25803f

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

Change-Id: I61d93c092aafbdd6653fe28625cc1b7c69144c85
tree: f44672b3268bf2c3b001cea1ab4113accc236bb3
  1. com/
  2. Android.bp
  3. import-maven-artifacts.sh