Now ignoring adb shell service return error code in acov-llvm.py

Bug: 261529166

Ignore failures when sending the flush signal.  Some processes may have
exited after we run `adb shell ps` but before we could send the flush signal.

Test: Successful run of coverage metrics using acov-llvm (as documented in go/android-native-coverage-local-workflow

Change-Id: I2fc0f71bf5f6d810b4124e28d7dd69ebfc2579b3
Signed-off-by: Shaju Mathew <shaju@google.com>
1 file changed