Camera: update camera audio restriction API

Add dedicated get API for API review feedback.

Test: updated CTS pass
Bug: 140524714
Change-Id: I0559e24d6d9f4a2d9db6c0b6035eaf49bd41d950
diff --git a/camera/Camera.cpp b/camera/Camera.cpp
index 19849f8..84d1d93 100644
--- a/camera/Camera.cpp
+++ b/camera/Camera.cpp
@@ -347,13 +347,20 @@
     return c->setPreviewCallbackTarget(callbackProducer);
 }
 
-int32_t Camera::setAudioRestriction(int32_t mode)
+status_t Camera::setAudioRestriction(int32_t mode)
 {
     sp <::android::hardware::ICamera> c = mCamera;
     if (c == 0) return NO_INIT;
     return c->setAudioRestriction(mode);
 }
 
+int32_t Camera::getGlobalAudioRestriction()
+{
+    sp <::android::hardware::ICamera> c = mCamera;
+    if (c == 0) return NO_INIT;
+    return c->getGlobalAudioRestriction();
+}
+
 // callback from camera service
 void Camera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
 {