Merge "Move equalizer header file to Equalizer folder" am: 220cd046ff am: c93642ad9b am: 3f49e2edb8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2291515

Change-Id: I812a4d799e74c41ccf435117383516f3f46d3258
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>