IStats HAL: Updated AIDL to version 2 am: 5540ebc0cc

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2339179

Change-Id: I65116a8e2b4b6a33bf5ac260a61e1d6e0bf92511
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>