Merge "Move IoUtils#deleteContents from CorePlatformApi set to framework" am: fc41cdfd4c am: 0dd0180edb

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1686657

Change-Id: I08b1d281a3b71556d783b1d4f352bc7a4ba8e879
tree: 1cb3ec61dcca7ebe449e405600a171d604a729f4
  1. framework/
  2. service/
  3. tests/
  4. OWNERS
  5. TEST_MAPPING