Expose flags for process execution

Let the caller decide if stdout and stderr must be inherited on process
creation, i.e. if stdout and stderr of the child process should be
printed in the scrcpy console.

This allows to get output and errors for specific adb commands depending
on the context.

PR #2827 <https://github.com/Genymobile/scrcpy/pull/2827>

app/src/util/process.h

@@ -67,20 +67,32 @@ enum sc_process_result {
     SC_PROCESS_ERROR_MISSING_BINARY,
 };
 
+#define SC_PROCESS_NO_STDOUT (1 << 0)
+#define SC_PROCESS_NO_STDERR (1 << 1)
+
 /**
  * Execute the command and write the process id to `pid`
+ *
+ * The `flags` argument is a bitwise OR of the following values:
+ *  - SC_PROCESS_NO_STDOUT
+ *  - SC_PROCESS_NO_STDERR
+ *
+ * It indicates if stdout and stderr must be inherited from the scrcpy process
+ * (i.e. if the process must output to the scrcpy console).
  */
 enum sc_process_result
-sc_process_execute(const char *const argv[], sc_pid *pid);
+sc_process_execute(const char *const argv[], sc_pid *pid, unsigned flags);
 
 /**
  * Execute the command and write the process id to `pid`
  *
  * If not NULL, provide a pipe for stdin (`pin`), stdout (`pout`) and stderr
  * (`perr`).
+ *
+ * The `flags` argument has the same semantics as in `sc_process_execute()`.
  */
 enum sc_process_result
-sc_process_execute_p(const char *const argv[], sc_pid *pid,
+sc_process_execute_p(const char *const argv[], sc_pid *pid, unsigned flags,
                      sc_pipe *pin, sc_pipe *pout, sc_pipe *perr);
 
 /**