libeffects: Add multichannel support to Reverb

Test: SoloTester and Clarity app
Test: Standalone application test
Bug: 129491957
Change-Id: Ifac02eb2a7ac3eba5fae9318c3ae1e1c7df4f681
diff --git a/media/libeffects/lvm/wrapper/Android.bp b/media/libeffects/lvm/wrapper/Android.bp
index afc4220..021020c 100644
--- a/media/libeffects/lvm/wrapper/Android.bp
+++ b/media/libeffects/lvm/wrapper/Android.bp
@@ -53,6 +53,7 @@
 
     cppflags: [
         "-fvisibility=hidden",
+        "-DSUPPORT_MC",
 
         "-Wall",
         "-Werror",