Merge "Upgrade speex to SpeexDSP-1.2.1" am: 6cb928436c am: 66259c4e9c am: 787bf1e57d

Original change: https://android-review.googlesource.com/c/platform/external/speex/+/2510141

Change-Id: Id858bee77d7001ee97a2345f9b80eaf8af5f5f1a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>