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

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

Change-Id: I2aced35532a572f7912abde832cfdce66c34a3d0
tree: e6cbcb851da54e839d004dd661a2889c5828d665
  1. framework/
  2. service/
  3. tests/
  4. OWNERS
  5. TEST_MAPPING