Merge "Memtrack HAL: Remove MemtrackType::NUM_TYPES" am: 5a52686fd6 am: 15bf0b3294 am: e14044a465

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1587451

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib2ce80cf1c06dee9eac7257e7c2f6d6b73997442