(1/n) Make the GlifHeader scrollable on FingerprintEnrollEnrolling(

UDPFS) layout page.

1. To override GlifLayout's onInflateTemplate() then embedding a
ScrollView on GlifHeader.
2. Remove previous hiding the description text snippet
3. Handling UDFPS enroll lottie position problem.
4. Solve the ProgressBar overlapped with FooterBar problem.

Flag: com.android.settings.flags.enroll_layout_truncate_improvement

Bug: 359149850
Bug: 367164671
Bug: 362522976

Test: atest UdfpsEnrollEnrollingViewTest
Test: Build Forrest ROM then check the UI in different scenarios
Change-Id: Iee44cb5815286233f23266e3d86fd8335ab2087d

aconfig/settings_biometrics_integration_declarations.aconfig

@@ -15,6 +15,16 @@ flag {
   bug: "301226085"
 }
 
+flag {
+  name: "enroll_layout_truncate_improvement"
+  namespace: "biometrics_integration"
+  description: "This flag controls whether the enroll layout truncate improvement feature should be enabled"
+  bug: "359149850"
+  metadata {
+      purpose: PURPOSE_BUGFIX
+  }
+}
+
 flag {
   name: "screen_off_unlock_power_optimization"
   namespace: "biometrics_integration"