Handle repeating keycodes

Initialize "repeat" count on key events.

PR #1519 <https://github.com/Genymobile/scrcpy/pull/1519>
Refs #1013 <https://github.com/Genymobile/scrcpy/pull/1013>

Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/input_manager.h

@@ -14,6 +14,11 @@ struct input_manager {
     struct controller *controller;
     struct video_buffer *video_buffer;
     struct screen *screen;
+
+    // SDL reports repeated events as a boolean, but Android expects the actual
+    // number of repetitions. This variable keeps track of the count.
+    unsigned repeat;
+
     bool prefer_text;
 };