Merge "Fix `adb root` invocations in script `acov-llvm.py`." am: 97988980d0 am: a0c4af18c3

Original change: https://android-review.googlesource.com/c/platform/development/+/1706846

Change-Id: I74cb744717d5ce2b4306345fd1e6249b15c1fa76