Add error codes to CredentialManagerException.

Bug: 246564035
Test: Local Build & Deployment
Change-Id: Ib4817998135772c42c67d26638b669d2367da5a6

core/java/android/credentials/CredentialManagerException.java

@@ -23,6 +23,20 @@ public class CredentialManagerException extends Exception {
     /** Indicates that an unknown error was encountered. */
     public static final int ERROR_UNKNOWN = 0;
 
+    /**
+     * The given CredentialManager operation is cancelled by the user.
+     *
+     * @hide
+     */
+    public static final int ERROR_USER_CANCELLED = 1;
+
+    /**
+     * No appropriate provider is found to support the target credential type(s).
+     *
+     * @hide
+     */
+    public static final int ERROR_PROVIDER_NOT_FOUND = 2;
+
     public final int errorCode;
 
     public CredentialManagerException(int errorCode, @Nullable String message) {