Implement computer-to-device clipboard copy

It was already possible to _paste_ (with Ctrl+v) the content of the
computer clipboard on the device. Technically, it injects a sequence of
events to generate the text.

Add a new feature (Ctrl+Shift+v) to copy to the device clipboard
instead, without injecting the content. Contrary to events injection,
this preserves the UTF-8 content exactly, so the text is not broken by
special characters.

<https://github.com/Genymobile/scrcpy/issues/413>

server/src/test/java/com/genymobile/scrcpy/ControlEventReaderTest.java

@@ -190,6 +190,26 @@ public class ControlEventReaderTest {
         Assert.assertEquals(ControlEvent.TYPE_GET_CLIPBOARD, event.getType());
     }
 
+    @Test
+    public void testParseSetClipboardEvent() throws IOException {
+        ControlEventReader reader = new ControlEventReader();
+
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        DataOutputStream dos = new DataOutputStream(bos);
+        dos.writeByte(ControlEvent.TYPE_SET_CLIPBOARD);
+        byte[] text = "testé".getBytes(StandardCharsets.UTF_8);
+        dos.writeShort(text.length);
+        dos.write(text);
+
+        byte[] packet = bos.toByteArray();
+
+        reader.readFrom(new ByteArrayInputStream(packet));
+        ControlEvent event = reader.next();
+
+        Assert.assertEquals(ControlEvent.TYPE_SET_CLIPBOARD, event.getType());
+        Assert.assertEquals("testé", event.getText());
+    }
+
     @Test
     public void testMultiEvents() throws IOException {
         ControlEventReader reader = new ControlEventReader();