Fix visibility issue with fingerprint icon.

- set icon tint color to control normal. The icon fill color is white,
and without the tint color set, it is invisible on a white background.

Change-Id: I9cda0e9105701230256620bd4ea904c96d7bc166
Fixes: 77151365
Test: visual

res/drawable/ic_fingerprint.xml

@@ -18,7 +18,8 @@
         android:width="32dp"
         android:height="32dp"
         android:viewportWidth="32.0"
-        android:viewportHeight="32.0">
+        android:viewportHeight="32.0"
+        android:tint="?android:attr/colorControlNormal">
     <path
         android:fillColor="#ffffff"
         android:pathData="M23.7,5.9c-0.1,0.0 -0.2,0.0 -0.3,-0.1C21.0,4.5 18.6,3.9 16.0,3.9c-2.5,0.0 -4.6,0.6 -6.9,1.9C8.8,6.0 8.3,5.9 8.1,5.5C7.9,5.2 8.0,4.7 8.4,4.5c2.5,-1.4 4.9,-2.1 7.7,-2.1c2.8,0.0 5.4,0.7 8.0,2.1c0.4,0.2 0.5,0.6 0.3,1.0C24.2,5.7 24.0,5.9 23.7,5.9z"/>