Fix MediaCas CTS failure

TRM is checking input parameters and won't allow null executor.
Use context main executor to call Tuner Resource Manager (TRM)

Also fix ConcurrentModificationException when use HashMap.forEach to free element in hashmap.

Test: atest MediaCasTest
bug: 161391585
Change-Id: Ie5111b46b5b601f0a5b56e5828d79771e153a210

media/java/android/media/MediaCas.java

@@ -34,7 +34,6 @@ import android.media.tv.tunerresourcemanager.ResourceClientProfile;
 import android.media.tv.tunerresourcemanager.TunerResourceManager;
 import android.os.Bundle;
 import android.os.Handler;
-import android.os.HandlerExecutor;
 import android.os.HandlerThread;
 import android.os.IHwBinder;
 import android.os.Looper;
@@ -50,6 +49,7 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 
@@ -392,7 +392,10 @@ public final class MediaCas implements AutoCloseable {
             @Override
             public void onReclaimResources() {
                 synchronized (mSessionMap) {
-                    mSessionMap.forEach((casSession, sessionResourceHandle) -> casSession.close());
+                    List<Session> sessionList = new ArrayList<>(mSessionMap.keySet());
+                    for (Session casSession: sessionList) {
+                        casSession.close();
+                    }
                 }
                 mEventHandler.sendMessage(mEventHandler.obtainMessage(
                         EventHandler.MSG_CAS_RESOURCE_LOST));
@@ -734,7 +737,7 @@ public final class MediaCas implements AutoCloseable {
             ResourceClientProfile profile =
                     new ResourceClientProfile(tvInputServiceSessionId, priorityHint);
             mTunerResourceManager.registerClientProfile(
-                    profile, new HandlerExecutor(mEventHandler), mResourceListener, clientId);
+                    profile, context.getMainExecutor(), mResourceListener, clientId);
             mClientId = clientId[0];
         }
     }