Add PASTE extra key for pasting text from clipboard

terminal-emulator/src/test/java/com/termux/terminal/TerminalTestCase.java

@@ -37,10 +37,14 @@ public abstract class TerminalTestCase extends TestCase {
 		}
 
 		@Override
-		public void clipboardText(String text) {
+		public void onCopyTextToClipboard(String text) {
 			clipboardPuts.add(text);
 		}
 
+        @Override
+        public void onPasteTextFromClipboard() {
+        }
+
 		@Override
 		public void onBell() {
 			bellsRung++;