Add analyze_bcpf.py script to help manage bootclasspath_fragments am:...

Add analyze_bcpf.py script to help manage bootclasspath_fragments am: 4dcf6595 am: a87d1488 am: 04c32d2b

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2020741



Change-Id: I0a46883c16ebaf59fcf30437c592bf1ca9823102
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>