audio spatializer: more resource usage optimizations am: 11094176

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/17591403



Change-Id: Ie72358b95fcb98f7dc6f4ec030d619bbeee20e52
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>