Align the handling of no-mcc-mnc configs in vendor.xml with carrierconfig app am: 4fc47e4a1f

Original change: https://android-review.googlesource.com/c/platform/tools/carrier_settings/+/1690689

Change-Id: Ifc1327c6323a689bd41007374641a1aaa089decb
tree: 3e2138982cecd7057a274f1b6ddaee6622ed7681
  1. bin/
  2. java/
  3. proto/
  4. python/
  5. Android.bp
  6. main.sh
  7. OWNERS
  8. README