Themes: Only kill launchers if overlays or icons changed

There is no need to kill the launcher for every coponent changed.
The only ones that really concern us in regards to killing launchers
are MODIFIES_OVERLAYS and MODIFIES_ICONS

Change-Id: I840b8e2ecd4b52a33f352809c5d3d2c7e92ce85e

Author: 0xD34D

services/java/com/android/server/ThemeService.java

@@ -221,7 +221,7 @@ private void doApplyTheme(Map<String, String> componentMap) {
 
         updateConfiguration(componentMap);
 
-        killLaunchers();
+        killLaunchers(componentMap);
 
         postFinish(true, componentMap);
         mIsThemeApplying = false;
@@ -647,7 +647,12 @@ private static ThemeConfig.Builder createBuilderFrom(Configuration config,
 
     // Kill the current Home process, they tend to be evil and cache
     // drawable references in all apps
-    private void killLaunchers() {
+    private void killLaunchers(Map<String, String> componentMap) {
+        if (!(componentMap.containsKey(ThemesColumns.MODIFIES_ICONS)
+                || componentMap.containsKey(ThemesColumns.MODIFIES_OVERLAYS))) {
+            return;
+        }
+
         final ActivityManager am =
                 (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
         final PackageManager pm = mContext.getPackageManager();