Remove subtext when enrollment stage changes

Bug: 272145668
Test: Manual (Try enrolling fingerprint in UDFPS, the subtext should
disappear when lottie asset is introduced)

Change-Id: I912ff2b32644d05cc189105ae1679fa14b04a1ef

src/com/android/settings/biometrics/fingerprint/FingerprintEnrollEnrolling.java

@@ -676,7 +676,10 @@ public class FingerprintEnrollEnrolling extends BiometricsEnrollEnrolling {
         }
     }
 
-    private void configureEnrollmentStage(@RawRes int lottie) {
+    @VisibleForTesting void configureEnrollmentStage(@RawRes int lottie) {
+        if (!mCanAssumeSfps) {
+            setDescriptionText("");
+        }
         LottieCompositionFactory.fromRawRes(this, lottie)
                 .addListener((c) -> {
                     mIllustrationLottie.setComposition(c);