audio flinger: rename Bluetooth latency mode APIs

Rename APIs controlling Bluetooth variable latency
after API review suggestions.

Bug: 257922898
Test: make
Change-Id: I517ad9c6aef14975c9e0a1a2703d1b17d638ea0e
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 16ad964..6dd1cda 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -305,9 +305,11 @@
     virtual status_t getSupportedLatencyModes(audio_io_handle_t output,
             std::vector<audio_latency_mode_t>* modes);
 
-    virtual status_t setBluetoothLatencyModesEnabled(bool enabled);
+    virtual status_t setBluetoothVariableLatencyEnabled(bool enabled);
 
-    virtual status_t supportsBluetoothLatencyModes(bool* support);
+    virtual status_t isBluetoothVariableLatencyEnabled(bool* enabled);
+
+    virtual status_t supportsBluetoothVariableLatency(bool* support);
 
     virtual status_t getSoundDoseInterface(const sp<media::ISoundDoseCallback>& callback,
                                            sp<media::ISoundDose>* soundDose);