Merge "simpleperf: fix unpadding build id in pprof_proto_generator.py." am: 09c8a12e18 am: e54e2ada08 am: 0c5e00b23b

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

Change-Id: Ibaa05125e303545fad31215d2697726725ffab33