Merge "codec2: BufferPoolClient: fix NPE in fetchBufferHandle if connection is null" into main am: 43147f43cf am: 18c83054b4

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3222208

Change-Id: Ic6d30045a3b2a3404898fca8fea9606d77db92f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>