Revert "Revert "Audio effects: define interface between EffectModule and audio framework""

This reverts commit 3fd6a2cc.

Also fixes native coverage build.

Bug: 146177259
Test: build/soong/soong_ui.bash --make-mode TARGET_PRODUCT=cf_x86_phone TARGET_BUILD_VARIANT=userdebug NATIVE_COVERAGE=true
Change-Id: Ib78a22619123cd1848b047931b02d4061def3a23
Merged-In: Ib78a22619123cd1848b047931b02d4061def3a23