Add log to capture the hardware status.

Sometimes Settings Search show the items that are not supported by
the hardware. e.g. FaceLock.
Add log to check the HW status when the problem occurred.

Bug: 156667203
Test: watch the log output.
Change-Id: Ie6a89f338aac6f7bdefc69fc84cfa5bf848ed015

src/com/android/settings/biometrics/face/FaceStatusPreferenceController.java

@@ -41,7 +41,7 @@ public class FaceStatusPreferenceController extends BiometricStatusPreferenceCon
 
     @Override
     protected boolean isDeviceSupported() {
-        return mFaceManager != null && mFaceManager.isHardwareDetected();
+        return FaceSettings.isFaceHardwareDetected(mContext);
     }
 
     @Override