Fix bug in uninitialized variable am: 7ad4cd6486 am: 8e13080b75

Original change: https://android-review.googlesource.com/c/platform/tools/external_updater/+/2980254

Change-Id: I35352e4cc5a202045ac7af4353895b19359f7fe9
Signed-off-by: Automerger Merge Worker <[email protected]>