Merge "Show a warning if adb is not root before gdbclient.py" am: 84eeb1a8e6 am: 16deba10d9 am: b092e69830

Original change: https://android-review.googlesource.com/c/platform/development/+/1427154

Change-Id: If6fbcf399562c43313155848dd12138fce8f4d69