Delay HID events on Ctrl+v

When Ctrl+v is pressed, a control is sent to the device to set the
device clipboard before injecting Ctrl+v.

With the InputManager method, it is guaranteed that the device
synchronization is executed before handling Ctrl+v, since the commands
are executed on the device in sequence.

However, HID are injected from the computer, so there is no such
guarantee. As a consequence, on Android, Ctrl+v triggers a paste with
the old clipboard content.

To workaround the issue, wait a bit (2 milliseconds) from the AOA
thread before injecting the event, to leave enough time for the
clipboard to be set before injecting Ctrl+v.

app/src/aoa_hid.h

@@ -9,11 +9,13 @@
 #include "scrcpy.h"
 #include "util/cbuf.h"
 #include "util/thread.h"
+#include "util/tick.h"
 
 struct sc_hid_event {
     uint16_t accessory_id;
     unsigned char *buffer;
     uint16_t size;
+    sc_tick delay;
 };
 
 // Takes ownership of buffer