Merge "simpleperf: fix unpadding build id in pprof_proto_generator.py." am: 09c8a12e18 am: e54e2ada08

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/1915117

Change-Id: I6ee8b8a5cf09e7fd94f914a76d34264fe6195b8c