Enabled <time> tags to be read by TalkBack on Android

Added explicit case for <time> tags to prevent node from being ignored
as a leaf on Android. This will allow the <time> nodes to be traversed
with AT the same as on other platforms.

Bug: 1043377
Change-Id: Ibd243578322485d7abafc4b5f7a8dbe0f9986d79
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2018243
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Mark Schillaci <mschillaci@google.com>
Cr-Commit-Position: refs/heads/master@{#736159}

content/browser/accessibility/browser_accessibility_android.cc

@@ -1787,7 +1787,6 @@ bool BrowserAccessibilityAndroid::ShouldExposeValueAsName() const {
     case ax::mojom::Role::kDateTime:
     case ax::mojom::Role::kTextField:
     case ax::mojom::Role::kTextFieldWithComboBox:
-    case ax::mojom::Role::kTime:
       return true;
     default:
       break;

content/test/data/accessibility/aria/aria-time-expected-android.txt

@@ -1,5 +1,5 @@
 android.webkit.WebView focusable focused scrollable
-++android.view.View role_description='time'
-++android.view.View role_description='time'
+++android.view.View role_description='time' name='role'
+++android.view.View role_description='time' name='element (no name)'
 ++android.view.View name=' '
-++android.view.View role_description='time' hint='include me'
+++android.view.View role_description='time' name='include me'

content/test/data/accessibility/html/time-expected-android.txt

@@ -1,5 +1,5 @@
 android.webkit.WebView focusable focused scrollable
 ++android.view.View
-++++android.view.View role_description='time'
+++++android.view.View role_description='time' name='10:00'
 ++++android.view.View name=' '
-++++android.view.View role_description='time'
+++++android.view.View role_description='time' name='Valentines day'