Revert "Add android.hardware.memtrack-unstable-ndk_platform"

Revert submission 1518702-memtrack-aidl

Reason for revert: Broken tests and boot time regressions
Reverted Changes:
Ic4dd70e2c:Add android.hardware.memtrack-unstable-ndk_platfor...
Iaf99d0ca4:Add stable aidl memtrack HAL to product packages
Iac54ae2ba:Add stable aidl memtrack hal to vndk list
If310210a3:libmemtrack: Add support for AIDL memtrack HAL
Ib6c634def:Memtrack HAL: Add stable AIDL implementation
I5e1d0e006:Memtrack HAL stable aidl sepolicy

Change-Id: I4fc71dc5813d10600727a2630c10f5d113f61936