Disable heap pointer tagging on Q or earlier.

For testing, this feature can be enabled per-application with
  adb shell am compat 135754954 <app.name>

Bug: 135754954
Bug: 147147490
Test: malloc() returns tagged pointer with the feature enabled

Change-Id: I067b4ba6f5fbfcb8287f0cc07d17978dbe708806
2 files changed