Fixes #3712: Add accessibility support for ImageRegionSelectionIntera…

…ction [Removed Todo followed by #4497] (#4543)

* content description added

* tests updated

* KDoc and comment added

* textproto updated

* kdoc comment updated

* @param changed to @Property in kdoc

* TODO removed

* Updated issue number in ToDo

instrumentation/src/javatests/org/oppia/android/instrumentation/player/ExplorationPlayerTest.kt

@@ -58,7 +58,7 @@ class ExplorationPlayerTest {
     // Image Region Selection Interaction.
     val imageSelectionView = device.findObjectByRes("interaction_container_frame_layout")
     device.waitForRes("image_click_interaction_image_view")
-    // TODO(#3712): Use content description to fetch the image region.
+    // TODO(#4639): Use content description to fetch the image region.
     imageSelectionView.children.get(2).click()
     device.findObjectByText("SUBMIT").click()
     device.findObjectByText("CONTINUE").click()