[automerger skipped] Add test to catch subsequent scans of nomedia directories am: d901a73917 -s ours

am skip reason: Change-Id I2f83721ef0ec2bc92f80c11c8a7e7ffc73123723 with SHA-1 81c83b1a79 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/providers/MediaProvider/+/13253823

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I0775d66ce9c461f7f4ee14a61ee2dcd2b48164e7