Merge "libhwui: Use wc instead of du to monitor file write" into sc-dev

# so we continue to show the "waiting for app interaction" message as long as the app still requires

# interaction to draw more frames.

adb_test_file_nonzero() {

    # grab first byte of `du` output

    X="$(adb shell "du \"$1\" 2> /dev/null | dd bs=1 count=1 2> /dev/null")"

    # grab first byte of `wc -c` output

    X="$(adb shell "wc -c \"$1\" 2> /dev/null | dd bs=1 count=1 2> /dev/null")"

    test "$X" && test "$X" -ne 0

}

timeout=$(( $(date +%s) + $phase1_timeout_seconds))