Merge changes from topics "aidl-rust-null-parcelable-flags",...

Merge changes from topics "aidl-rust-null-parcelable-flags", "aidl-rust-parcelable-holder", "aidl-rust-parcelable-trait" am: 2c62f367 am: f3cc67f6 am: 212f8244

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1819036

Change-Id: I1de694263f6c1cecc6745e1093667d65b813ad2d