Propagate exception information through BinderRunner

Use exceptions to provide better error messages for Geocoder APIs.

Test: presubmits
Change-Id: Idd8a02d5ff8ec211d4855aefeae55d28943a3e5e

services/core/java/com/android/server/location/GeocoderProxy.java

@@ -83,9 +83,9 @@ public class GeocoderProxy {
             }
 
             @Override
-            public void onError() {
+            public void onError(Throwable t) {
                 try {
-                    listener.onResults("Service not Available", Collections.emptyList());
+                    listener.onResults(t.toString(), Collections.emptyList());
                 } catch (RemoteException e) {
                     // ignore
                 }
@@ -110,9 +110,9 @@ public class GeocoderProxy {
             }
 
             @Override
-            public void onError() {
+            public void onError(Throwable t) {
                 try {
-                    listener.onResults("Service not Available", Collections.emptyList());
+                    listener.onResults(t.toString(), Collections.emptyList());
                 } catch (RemoteException e) {
                     // ignore
                 }

services/core/java/com/android/server/location/provider/proxy/ProxyLocationProvider.java

@@ -208,7 +208,7 @@ public class ProxyLocationProvider extends AbstractLocationProvider implements
             }
 
             @Override
-            public void onError() {
+            public void onError(Throwable t) {
                 synchronized (mLock) {
                     mFlushListeners.remove(callback);
                 }

services/core/java/com/android/server/servicewatcher/ServiceWatcher.java

@@ -70,7 +70,7 @@ public interface ServiceWatcher {
          * cleanup in response to a single binder operation, it should not be used to propagate
          * errors further. Run on the ServiceWatcher thread.
          */
-        default void onError() {}
+        default void onError(Throwable t) {}
     }
 
     /**

services/core/java/com/android/server/servicewatcher/ServiceWatcherImpl.java

@@ -25,6 +25,7 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
+import android.os.DeadObjectException;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
@@ -239,7 +240,7 @@ class ServiceWatcherImpl<TBoundServiceInfo extends BoundServiceInfo> implements
             Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
 
             if (mBinder == null) {
-                operation.onError();
+                operation.onError(new DeadObjectException());
                 return;
             }
 
@@ -249,7 +250,7 @@ class ServiceWatcherImpl<TBoundServiceInfo extends BoundServiceInfo> implements
                 // binders may propagate some specific non-RemoteExceptions from the other side
                 // through the binder as well - we cannot allow those to crash the system server
                 Log.e(TAG, "[" + mTag + "] error running operation on " + mBoundServiceInfo, e);
-                operation.onError();
+                operation.onError(e);
             }
         }