Merge "Added javadoc to apn retry \ throttling related methods" am: 89db74b504 am: c7e3e264f2

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1598496

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Icd81804c8d8d9c52c1a8e777988e2b64d679b54d