Add basic dumpsys logging for providers

Bug: 257039897
Test: adb shell dumpsys media_router
Change-Id: Icb754ec6fbf5808dca59ecb7aa9763f12decf147

services/core/java/com/android/server/media/MediaRoute2Provider.java

@@ -19,6 +19,7 @@ package com.android.server.media;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.content.ComponentName;
+import android.media.MediaRoute2Info;
 import android.media.MediaRoute2ProviderInfo;
 import android.media.RouteDiscoveryPreference;
 import android.media.RoutingSessionInfo;
@@ -26,6 +27,7 @@ import android.os.Bundle;
 
 import com.android.internal.annotations.GuardedBy;
 
+import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
@@ -108,6 +110,28 @@ abstract class MediaRoute2Provider {
                 && mComponentName.getClassName().equals(className);
     }
 
+    public void dump(PrintWriter pw, String prefix) {
+        pw.println(prefix + getDebugString());
+        prefix += "  ";
+        if (mProviderInfo == null) {
+            pw.println(prefix + "<provider info not received, yet>");
+        } else if (mProviderInfo.getRoutes().isEmpty()) {
+            pw.println(prefix + "<provider info has no routes>");
+        } else {
+            for (MediaRoute2Info route : mProviderInfo.getRoutes()) {
+                pw.printf("%s%s | %s\n", prefix, route.getId(), route.getName());
+            }
+        }
+    }
+
+    @Override
+    public String toString() {
+        return getDebugString();
+    }
+
+    /** Returns a human-readable string describing the instance, for debugging purposes. */
+    protected abstract String getDebugString();
+
     public interface Callback {
         void onProviderStateChanged(@Nullable MediaRoute2Provider provider);
         void onSessionCreated(@NonNull MediaRoute2Provider provider,

services/core/java/com/android/server/media/MediaRoute2ProviderServiceProxy.java

@@ -44,7 +44,6 @@ import android.util.Slog;
 
 import com.android.internal.annotations.GuardedBy;
 
-import java.io.PrintWriter;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -83,10 +82,6 @@ final class MediaRoute2ProviderServiceProxy extends MediaRoute2Provider
         mHandler = new Handler(Looper.myLooper());
     }
 
-    public void dump(PrintWriter pw, String prefix) {
-        pw.println(prefix + getDebugString());
-    }
-
     public void setManagerScanning(boolean managerScanning) {
         if (mIsManagerScanning != managerScanning) {
             mIsManagerScanning = managerScanning;
@@ -488,11 +483,7 @@ final class MediaRoute2ProviderServiceProxy extends MediaRoute2Provider
     }
 
     @Override
-    public String toString() {
-        return getDebugString();
-    }
-
-    private String getDebugString() {
+    protected String getDebugString() {
         return TextUtils.formatSimple(
                 "ProviderServiceProxy - package: %s, bound: %b, connection (active:%b, ready:%b)",
                 mComponentName.getPackageName(),

services/core/java/com/android/server/media/MediaRouter2ServiceImpl.java

@@ -1751,6 +1751,7 @@ class MediaRouter2ServiceImpl {
             String indent = prefix + "  ";
             pw.println(indent + "mRunning=" + mRunning);
 
+            mSystemProvider.dump(pw, prefix);
             mWatcher.dump(pw, prefix);
         }
 

services/core/java/com/android/server/media/SystemMediaRoute2Provider.java

@@ -392,6 +392,15 @@ class SystemMediaRoute2Provider extends MediaRoute2Provider {
         mCallback.onSessionUpdated(this, sessionInfo);
     }
 
+    @Override
+    protected String getDebugString() {
+        return TextUtils.formatSimple(
+                "SystemMR2Provider - package: %s, selected route id: %s, bluetooth impl: %s",
+                mComponentName.getPackageName(),
+                mSelectedRouteId,
+                mBluetoothRouteController.getClass().getSimpleName());
+    }
+
     private static class SessionCreationRequest {
         final long mRequestId;
         final String mRouteId;