Add Display Activity

Separate activity with fixed-size surface

Bug: 389524419
Test: check if DisplayActivity shows something
Change-Id: I929e215439a0a3449c3f76a0b96f829261f00ee8
diff --git a/android/TerminalApp/res/values/strings.xml b/android/TerminalApp/res/values/strings.xml
index bdebb83..44009c3 100644
--- a/android/TerminalApp/res/values/strings.xml
+++ b/android/TerminalApp/res/values/strings.xml
@@ -55,6 +55,9 @@
     <!-- Action bar icon name for the settings view CHAR LIMIT=none] -->
     <string name="action_settings">Settings</string>
 
+    <!-- Action bar icon name for showing the display activity CHAR LIMIT=none] -->
+    <string name="action_display">Display</string>
+
     <!-- Toast message to notify that preparing terminal to start [CHAR LIMIT=none] -->
     <string name="vm_creation_message">Preparing terminal</string>
     <!-- Toast message to notify that terminal is stopping [CHAR LIMIT=none] -->