Add updater tool for rr prebuilts. am: b6fd073329 am: 46d5e1335b am: 3bf10e1115 am: 9e0c5b5a03 am: f72ac219fd

Original change: https://android-review.googlesource.com/c/platform/tools/rr_prebuilt/+/2749093

Change-Id: I39bbf617410da8fd0ddfc7ad079d08352328d9fc
Signed-off-by: Automerger Merge Worker <[email protected]>