Fix ChooserTarget app scoring

An initial sorting step before applying modifiers to the ChooserTarget
scores provided by apps was backwards, causing subsequent target
scores to be heavily penalized. Targets are then heavily influenced by
the lowest score in the set relative to the targets from other apps.

Bug 25013559

Change-Id: I39d5d7c601712fc6a19e694d5846d2c8d17a214f

core/java/com/android/internal/app/ChooserActivity.java

@@ -920,7 +920,7 @@ public class ChooserActivity extends ResolverActivity {
         @Override
         public int compare(ChooserTarget lhs, ChooserTarget rhs) {
             // Descending order
-            return (int) Math.signum(lhs.getScore() - rhs.getScore());
+            return (int) Math.signum(rhs.getScore() - lhs.getScore());
         }
     }