Enable the mdoc UI.

Bug: 276777444
Test: manual
Change-Id: I7a4b2ef6bc7f6d0afae1a7ce3b09ad190f0b6570

packages/CredentialManager/src/com/android/credentialmanager/DataConverter.kt

@@ -210,7 +210,11 @@ class GetFlowUtils {
                 appName = originName
                     ?: getAppLabel(context.packageManager, requestInfo.appPackageName)
                     ?: return null,
-                preferImmediatelyAvailableCredentials = preferImmediatelyAvailableCredentials
+                preferImmediatelyAvailableCredentials = preferImmediatelyAvailableCredentials,
+                preferIdentityDocUi = getCredentialRequest.data.getBoolean(
+                    // TODO(b/276777444): replace with direct library constant reference once
+                    // exposed.
+                    "androidx.credentials.BUNDLE_KEY_PREFER_IDENTITY_DOC_UI"),
             )
         }
 

packages/CredentialManager/src/com/android/credentialmanager/getflow/GetModel.kt

@@ -42,7 +42,7 @@ internal fun hasContentToDisplay(state: GetCredentialUiState): Boolean {
 }
 
 internal fun isFallbackScreen(state: GetCredentialUiState): Boolean {
-    return false
+    return state.requestDisplayInfo.preferIdentityDocUi
 }
 
 internal fun findAutoSelectEntry(providerDisplayInfo: ProviderDisplayInfo): CredentialEntryInfo? {
@@ -172,6 +172,7 @@ class ActionEntryInfo(
 data class RequestDisplayInfo(
     val appName: String,
     val preferImmediatelyAvailableCredentials: Boolean,
+    val preferIdentityDocUi: Boolean,
 )
 
 /**