[automerger skipped] Merge "mkdir .incomplete in backing storage to fix...

[automerger skipped] Merge "mkdir .incomplete in backing storage to fix CTS/GTS failures" into android11-tests-dev am: f6e44281 -s ours

am skip reason: skipped by user jsusbilla

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1536156

Change-Id: Ie57a82ac77100640da481bf279d908905b0ce4f9