[automerger skipped] Rip out getProcessAgeMs. am: 8ea10819ca -s ours am: d081c12130 -s ours

am skip reason: Change-Id Ice3dddee6d62c443d3fd88e1082e5af7a58b4255 with SHA-1 489e7571db is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/libhidl/+/13382330

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I038fec434b96d3ff84b3b62597a09987c6c4f4a6