Disable talkback for title and subtitle in BP

Discussed with kerrykao@, disable talkback for title and subtitle in BP.

Fixes: 267405624
Test: Manual (see bug)
Change-Id: Ic913bd7f543da7a9a8d9b180b57071b1b079e837

packages/SystemUI/res/layout/auth_biometric_contents.xml

@@ -24,6 +24,7 @@
         android:singleLine="true"
         android:marqueeRepeatLimit="1"
         android:ellipsize="marquee"
+        android:importantForAccessibility="no"
         style="@style/TextAppearance.AuthCredential.Title"/>
 
     <TextView
@@ -34,6 +35,7 @@
         android:singleLine="true"
         android:marqueeRepeatLimit="1"
         android:ellipsize="marquee"
+        android:importantForAccessibility="no"
         style="@style/TextAppearance.AuthCredential.Subtitle"/>
 
     <TextView

packages/SystemUI/src/com/android/systemui/biometrics/AuthBiometricView.java

@@ -741,10 +741,10 @@ public abstract class AuthBiometricView extends LinearLayout {
 
         mTitleView.setText(mPromptInfo.getTitle());
 
-        //setSelected could make marguee work
+        // setSelected could make marquee work
         mTitleView.setSelected(true);
         mSubtitleView.setSelected(true);
-        //make description view become scrollable
+        // make description view become scrollable
         mDescriptionView.setMovementMethod(new ScrollingMovementMethod());
 
         if (isDeviceCredentialAllowed()) {