Minor fixes

Author: Chuan Ren

EmailAuth/FirebaseEmailAuthUI/FUIConfirmEmailViewController.m

@@ -164,6 +164,9 @@ - (void)onNext:(NSString *)emailText {
         case FIRAuthErrorCodeTooManyRequests:
           [self showAlertWithMessage:FUILocalizedString(kStr_SignInTooManyTimesError)];
           return;
+        default:
+          [self showAlertWithMessage:error.description];
+          return;
       }
     }
 

EmailAuth/FirebaseEmailAuthUI/FUIEmailEntryViewController.m

@@ -249,7 +249,8 @@ - (void)sendSignInLinkToEmail:(NSString*)email {
                                       }
                                        dismissTitle:FUILocalizedString(kStr_Back)
                                      dismissHandler:^{
-                                       [self.navigationController popToRootViewControllerAnimated:YES];
+                                       [self.navigationController dismissViewControllerAnimated:YES
+                                                                                     completion:nil];
                                      }
                            presentingViewController:self];
     }

samples/objc/FirebaseUI-demo-objc/Samples/Auth/FUIAuthViewController.m

@@ -375,7 +375,7 @@ + (NSArray *)getListOfIDPs:(NSArray<NSIndexPath *> *)selectedRows
             FIRActionCodeSettings *actionCodeSettings = [[FIRActionCodeSettings alloc] init];
             actionCodeSettings.URL = [NSURL URLWithString:@"https://fb-sa-1211.appspot.com"];
             actionCodeSettings.handleCodeInApp = YES;
-            [actionCodeSettings setAndroidPackageName:@"com.example.android"
+            [actionCodeSettings setAndroidPackageName:@"com.firebase.uidemo"
                                 installIfNotAvailable:NO
                                        minimumVersion:@"12"];