Fix back arrow behavior for remote-only sign-in flow

It should lead back to the snackbar. Currently it cancels the whole
flow.

Bug: 280517963
Test: manual (see bug for recording)
Change-Id: Ibd4993dbca888c0c9f012963f54623cc426571ae

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

@@ -232,6 +232,14 @@ class CredentialSelectorViewModel(
         )
     }
 
+    fun getFlowOnBackToHybridSnackBarScreen() {
+        uiState = uiState.copy(
+            getCredentialUiState = uiState.getCredentialUiState?.copy(
+                currentScreenState = GetScreenState.REMOTE_ONLY
+            )
+        )
+    }
+
     fun getFlowOnBackToPrimarySelectionScreen() {
         uiState = uiState.copy(
             getCredentialUiState = uiState.getCredentialUiState?.copy(

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

@@ -121,9 +121,10 @@ fun GetCredentialScreen(
                                 providerDisplayInfo = getCredentialUiState.providerDisplayInfo,
                                 onEntrySelected = viewModel::getFlowOnEntrySelected,
                                 onBackButtonClicked =
-                                viewModel::getFlowOnBackToPrimarySelectionScreen,
+                                if (getCredentialUiState.isNoAccount)
+                                    viewModel::getFlowOnBackToHybridSnackBarScreen
+                                else viewModel::getFlowOnBackToPrimarySelectionScreen,
                                 onCancel = viewModel::onUserCancel,
-                                isNoAccount = getCredentialUiState.isNoAccount,
                                 onLog = { viewModel.logUiEvent(it) },
                             )
                             viewModel.uiMetrics.log(GetCredentialEvent
@@ -327,7 +328,6 @@ fun AllSignInOptionCard(
     onEntrySelected: (BaseEntry) -> Unit,
     onBackButtonClicked: () -> Unit,
     onCancel: () -> Unit,
-    isNoAccount: Boolean,
     onLog: @Composable (UiEventEnum) -> Unit,
 ) {
     val sortedUserNameToCredentialEntryList =
@@ -336,7 +336,7 @@ fun AllSignInOptionCard(
     SheetContainerCard(topAppBar = {
         MoreOptionTopAppBar(
             text = stringResource(R.string.get_dialog_title_sign_in_options),
-            onNavigationIconClicked = if (isNoAccount) onCancel else onBackButtonClicked,
+            onNavigationIconClicked = onBackButtonClicked,
             bottomPadding = 0.dp,
         )
     }) {