Refactor haptic constant.

Use the constant from IExternalVibratorService.

Bug: 124318236
Test: play audio-haptic coupled file
Change-Id: Ice2ac13d0f6a6a749bb6243230524336144fa5f4
diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index 94ea042..357370e 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -124,6 +124,7 @@
             void    setHapticIntensity(AudioMixer::haptic_intensity_t hapticIntensity) {
                 if (AudioMixer::isValidHapticIntensity(hapticIntensity)) {
                     mHapticIntensity = hapticIntensity;
+                    setHapticPlaybackEnabled(mHapticIntensity != AudioMixer::HAPTIC_SCALE_MUTE);
                 }
             }
             sp<os::ExternalVibration> getExternalVibration() const { return mExternalVibration; }
@@ -208,7 +209,7 @@
 
     bool                mHapticPlaybackEnabled = false; // indicates haptic playback enabled or not
     // intensity to play haptic data
-    AudioMixer::haptic_intensity_t mHapticIntensity = AudioMixer::HAPTIC_SCALE_NONE;
+    AudioMixer::haptic_intensity_t mHapticIntensity = AudioMixer::HAPTIC_SCALE_MUTE;
     class AudioVibrationController : public os::BnExternalVibrationController {
     public:
         explicit AudioVibrationController(Track* track) : mTrack(track) {}