Merge "libeffects: Remove unused functions" am: 6c4cf9792a am: d7cbe4a671

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1543689

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I412a5f19997e960c5afe95dd16441c2b36af91de