[Audiosharing] Fix add the secondary buds to audio sharing

onBroadcastMetadataChanged will trigger multiple times between adding
sinks to audio sharing. Avoid clean up device candidate list in
onBroadcastMetadataChanged

Test: manual
Bug: 381166680
Flag: com.android.settingslib.flags.enable_le_audio_sharing
Change-Id: I66693028478303b07879f5e53e60e2128aa9b114

src/com/android/settings/connecteddevice/audiosharing/AudioSharingSwitchBarController.java

@@ -187,7 +187,6 @@ public class AudioSharingSwitchBarController extends BasePreferenceController
                                 TAG,
                                 "Skip handleOnBroadcastReady: null assistant or "
                                         + "sink has active local source.");
-                        cleanUpStatesForStartSharing();
                         return;
                     }
                     handleOnBroadcastReady();