use protected field instead of getter

Bug: 430166215
Test: m .
Flag: com.android.bluetooth.flags.use_data_store_storage
Change-Id: I5ccde9290bad43eb6f6f5fb6d74a9f0cbf3c75d8
diff --git a/android/app/src/com/android/bluetooth/le_audio/LeAudioService.java b/android/app/src/com/android/bluetooth/le_audio/LeAudioService.java
index e30605e..8d7a196 100644
--- a/android/app/src/com/android/bluetooth/le_audio/LeAudioService.java
+++ b/android/app/src/com/android/bluetooth/le_audio/LeAudioService.java
@@ -5379,15 +5379,13 @@
             }
 
             if (input_configs.size() > 0) {
-                mAdapterService
-                        .getDatabaseManager()
-                        .setLeAudioUnicastInputCodecPreferenceList(entry.getKey(), input_configs);
+                mDatabaseManager.setLeAudioUnicastInputCodecPreferenceList(
+                        entry.getKey(), input_configs);
             }
 
             if (output_configs.size() > 0) {
-                mAdapterService
-                        .getDatabaseManager()
-                        .setLeAudioUnicastOutputCodecPreferenceList(entry.getKey(), output_configs);
+                mDatabaseManager.setLeAudioUnicastOutputCodecPreferenceList(
+                        entry.getKey(), output_configs);
             }
         }
     }
@@ -5411,13 +5409,9 @@
             }
 
             List<BluetoothLeAudioCodecConfig> output_configs =
-                    mAdapterService
-                            .getDatabaseManager()
-                            .getLeAudioUnicastOutputCodecPreferenceList(entry.getKey());
+                    mDatabaseManager.getLeAudioUnicastOutputCodecPreferenceList(entry.getKey());
             List<BluetoothLeAudioCodecConfig> input_configs =
-                    mAdapterService
-                            .getDatabaseManager()
-                            .getLeAudioUnicastInputCodecPreferenceList(entry.getKey());
+                    mDatabaseManager.getLeAudioUnicastInputCodecPreferenceList(entry.getKey());
 
             if (input_configs != null && output_configs != null) {
                 Log.d(