Update Launcher to use theme colors.

Instead of using hard-coded variants of colors, use the theme color
that corresponds (colorAccent, colorPrimary, etc).

Updated:
- "Search for more apps" text
- App info drop target hover color
- PageIndicatorDots
- All apps & widget scroll bar & scroll popup colors
- All apps section text color
- widget picker background color

TODO:
- widget picker header color

BUG: 28625102
Change-Id: I74b543ff71b8caef8cd950c8183ac84c759cb4d5
diff --git a/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java b/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java
index fd0045e..4ab0ea3 100644
--- a/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java
+++ b/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java
@@ -81,9 +81,7 @@
         mTrackPaint = new Paint();
         mTrackPaint.setColor(rv.getFastScrollerTrackColor(Color.BLACK));
         mTrackPaint.setAlpha(MAX_TRACK_ALPHA);
-        mThumbInactiveColor = rv.getFastScrollerThumbInactiveColor(
-                res.getColor(R.color.container_fastscroll_thumb_inactive_color));
-        mThumbActiveColor = res.getColor(R.color.container_fastscroll_thumb_active_color);
+        mThumbActiveColor = mThumbInactiveColor = Utilities.getColorAccent(rv.getContext());
         mThumbPaint = new Paint();
         mThumbPaint.setAntiAlias(true);
         mThumbPaint.setColor(mThumbInactiveColor);