Initial implementation of Nav Bar Accessibility Button
This allows an AccessibilityService to set a flag in its
AccessibilityServiceInfo that triggers the navigation bar to show an
Accessibility Button and observe callbacks when the button is clicked
or there are changes in the visibility of the navigation bar.
Test: Manual (Created a sample AccessibilityService) + CTS
Bug:29231271
Change-Id: I03d653d85bc37df28ed71d8bba94b7c75fe56e43
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 363b3e2..2cc2621 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -207,6 +207,8 @@
<string name="accessibility_home">Home</string>
<!-- Content description of the menu button for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->
<string name="accessibility_menu">Menu</string>
+ <!-- Content description of the accessibility button in the navigation bar (not shown on the screen). [CHAR LIMIT=NONE] -->
+ <string name="accessibility_accessibility_button">Accessibility</string>
<!-- Content description of the recents button for accessibility (not shown on the screen). [CHAR LIMIT=NONE] -->
<string name="accessibility_recent">Overview</string>
<!-- Content description of the search button for accessibility. [CHAR LIMIT=NONE] -->