Merge "Upgrade speex to SpeexDSP-1.2.1" am: 6cb928436c am: 66259c4e9c am: 787bf1e57d am: 27c5a8220c

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

Change-Id: I1b03cab1f3d6af22707854281b23176f458ffd00
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>