Update action mode close content description for a11y

Update action mode close button text to "Cancel". Because this
content description is not styleable, find the view and set
content description runtime.

Fix: 140364784
Test: manual
Test: atest DocumentsUIGoogleTests
Change-Id: I209f7da1acde5f73906221fcb15c81cdd35aaaa5

1 files changed, 4 insertions, 0 deletions

diff --git a/src/com/android/documentsui/ActionModeController.java b/src/com/android/documentsui/ActionModeController.java
index 49aeeab5c..1484c162d 100644
--- a/src/com/android/documentsui/ActionModeController.java
+++ b/src/com/android/documentsui/ActionModeController.java
@@ -76,6 +76,10 @@ public class ActionModeController extends SelectionObserver<String>
                     Log.d(TAG, "Starting action mode.");
                 }
                 mActionMode = mActivity.startActionMode(this);
+                final View closeButton = mActivity.findViewById(R.id.action_mode_close_button);
+                if (closeButton != null) {
+                    closeButton.setContentDescription(mActivity.getString(android.R.string.cancel));
+                }
             }
             updateActionMenu();
         } else {