Define the password type value in the framework.

Bug: 246564035
Test: Local Build & Deployment
Change-Id: I6c4e55a9e8a6112598014b7917ed95050159c8e9

core/java/android/credentials/Credential.java

@@ -31,6 +31,13 @@ import com.android.internal.util.Preconditions;
  */
 public final class Credential implements Parcelable {
 
+    /**
+     * The type value for password credential related operations.
+     *
+     * @hide
+     */
+    @NonNull public static final String TYPE_PASSWORD = "android.credentials.TYPE_PASSWORD";
+
     /**
      * The credential type.
      */