Merge "Add NonNull annotation to getAllSubscriptionInfoList" am: e5e2388844 am: b655259440 am: 0c5a020adc am: fa5490f98f

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1485142

Change-Id: I32c480fd6be64c9f40b0c3490ffa94ca5a585d1a