Have a setting in Developer Options to choose bug report handler

- This setting let user determines which app handles the Bug Report
shortcut on device.

BUG:143017534
Test: make -j56 RunSettingsRoboTests
Test: Ensure bug report handler setting shows correct handler apps.
Change-Id: I6160dadcd048e6c79f422e58fcd8defa04f991bb

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -419,6 +419,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
         controllers.add(new MemoryUsagePreferenceController(context));
         controllers.add(new BugReportPreferenceController(context));
+        controllers.add(new BugReportHandlerPreferenceController(context));
         controllers.add(new SystemServerHeapDumpPreferenceController(context));
         controllers.add(new LocalBackupPasswordPreferenceController(context));
         controllers.add(new StayAwakePreferenceController(context, lifecycle));