Eliminate CrashData and friends.

(CrashData was a custom-marshalled crash-info class used for a server crash
reporting system I am deprecating).  Use ApplicationErrorReport.CrashInfo
instead to report crash details (mostly the stack trace) from RuntimeInfo to
ActivityManagerService, since we're likely to need the crash information in
that form anyway.

Remove the (long-disabled) flags and support for the "Debug" button
in the crash dialog.

Further gut the ICheckinService interface by removing the crash-reporting
APIs (and everything that calls them), plus the synchronous checkin()
method (which has been stubbed out for a while now).

A new dropbox-based crash reporting system is in the works, but not part
of this change.

services/java/com/android/server/FallbackCheckinService.java

@@ -34,21 +34,11 @@ import com.google.android.net.ParentalControlState;
 public final class FallbackCheckinService extends ICheckinService.Stub {
     static final String TAG = "FallbackCheckinService";
     final Context mContext;
-    
+
     public FallbackCheckinService(Context context) {
         mContext = context;
     }
 
-    public boolean checkin() {
-        return false;  // failure, because not implemented
-    }
-
-    public void reportCrashSync(byte[] crashData) {
-    }
-
-    public void reportCrashAsync(byte[] crashData) {
-    }
-
     public void masterClear() {
         if (mContext.checkCallingOrSelfPermission("android.permission.MASTER_CLEAR") !=
                 PackageManager.PERMISSION_GRANTED) {