Update TabLayout and MaterialButtonHelper documentation for LayerDrawable workaround.

PiperOrigin-RevId: 219127481

Author: afohrman

lib/java/com/google/android/material/button/MaterialButtonHelper.java

@@ -49,7 +49,7 @@
 @RestrictTo(LIBRARY_GROUP)
 class MaterialButtonHelper {
 
-  // This is a hacky workaround. Currently on certain devices/versions,
+  // This is a workaround. Currently on certain devices/versions,
   // LayerDrawable will draw a black background underneath any layer with a non-opaque color,
   // unless we set the shape to be something that's not a perfect rectangle.
   private static final float CORNER_RADIUS_ADJUSTMENT = 0.00001F;

lib/java/com/google/android/material/tabs/TabLayout.java

@@ -2031,7 +2031,7 @@ private void updateBackgroundDrawable(Context context) {
 
       if (tabRippleColorStateList != null) {
         GradientDrawable maskDrawable = new GradientDrawable();
-        // TODO: Find a non-hacky workaround for this. Currently on certain devices/versions,
+        // TODO: Find a workaround for this. Currently on certain devices/versions,
         // LayerDrawable will draw a black background underneath any layer with a non-opaque color,
         // (e.g. ripple) unless we set the shape to be something that's not a perfect rectangle.
         maskDrawable.setCornerRadius(0.00001F);