Push startScan and stopScan down into InfoMediaManager

These methods have no usages outside of InfoMediaManager.

This is a non-functional change.

Bug: 327195340
Test: atest com.android.settingslib.media
Change-Id: Iec6552a64ef165175db695df8fe13239d1720f66

packages/SettingsLib/src/com/android/settingslib/media/InfoMediaManager.java

@@ -139,7 +139,6 @@ public abstract class InfoMediaManager extends MediaManager {
         }
     }
 
-    @Override
     public void startScan() {
         mMediaDevices.clear();
         startScanOnRouter();
@@ -156,7 +155,6 @@ public abstract class InfoMediaManager extends MediaManager {
         }
     }
 
-    @Override
     public abstract void stopScan();
 
     protected abstract void startScanOnRouter();

packages/SettingsLib/src/com/android/settingslib/media/MediaManager.java

@@ -54,16 +54,6 @@ public abstract class MediaManager {
         }
     }
 
-    /**
-     * Start scan connected MediaDevice
-     */
-    public abstract void startScan();
-
-    /**
-     * Stop scan MediaDevice
-     */
-    public abstract void stopScan();
-
     protected MediaDevice findMediaDevice(String id) {
         for (MediaDevice mediaDevice : mMediaDevices) {
             if (mediaDevice.getId().equals(id)) {

packages/SettingsLib/tests/robotests/src/com/android/settingslib/media/MediaManagerTest.java

@@ -52,17 +52,7 @@ public class MediaManagerTest {
 
         when(mDevice.getId()).thenReturn(TEST_ID);
 
-        mMediaManager = new MediaManager(mContext, null) {
-            @Override
-            public void startScan() {
-
-            }
-
-            @Override
-            public void stopScan() {
-
-            }
-        };
+        mMediaManager = new MediaManager(mContext, null) {};
     }
 
     @Test