Forbid --no-control in OTG mode

The whole purpose of OTG is to only control the device.

app/src/cli.c

@@ -2556,9 +2556,9 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
 
     if (opts->audio_playback && opts->audio_buffer == -1) {
         if (opts->audio_codec == SC_CODEC_FLAC) {
-            // Use 50 ms audio buffer by default, but use a higher value for FLAC,
+            // Use 50 ms audio buffer by default, but use a higher value for
-            // which is not low latency (the default encoder produces blocks of
+            // FLAC, which is not low latency (the default encoder produces
-            // 4096 samples, which represent ~85.333ms).
+            // blocks of 4096 samples, which represent ~85.333ms).
             LOGI("FLAC audio: audio buffer increased to 120 ms (use "
                  "--audio-buffer to set a custom value)");
             opts->audio_buffer = SC_TICK_FROM_MS(120);
@@ -2598,6 +2598,11 @@ parse_args_with_getopt(struct scrcpy_cli_args *args, int argc, char *argv[],
     }
 
     if (otg) {
+        if (!opts->control) {
+            LOGE("--no-control is not allowed in OTG mode");
+            return false;
+        }
+
         enum sc_keyboard_input_mode kmode = opts->keyboard_input_mode;
         if (kmode != SC_KEYBOARD_INPUT_MODE_AOA
                 && kmode != SC_KEYBOARD_INPUT_MODE_DISABLED) {