Upgrade bitreader to 0.3.8 am: badce51236 am: 91fdb20c0f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitreader/+/2939602

Change-Id: I3699d92cfcdadbc06f8b1a4279125d2d2b3a68b7
Signed-off-by: Automerger Merge Worker <[email protected]>