Fix/android voice call (#16180)

* fix(android): handle missing audio permission in voice calls

- Avoid stop errors when voice capture was never started
- Dispatch voice call error dialogs on the main thread
- Explain how to enable Audio capture on the Screen share page

Signed-off-by: fufesou <linlong1266@gmail.com>

* fix(android): restore audio after failed voice call switches

* fix: translations

Signed-off-by: fufesou <linlong1266@gmail.com>

* fix: translatin

Signed-off-by: fufesou <linlong1266@gmail.com>

* fix(i18n): match UI label capitalization in translated messages

Signed-off-by: fufesou <linlong1266@gmail.com>

---------

Signed-off-by: fufesou <linlong1266@gmail.com>
Co-authored-by: RustDesk <71636191+rustdesk@users.noreply.github.com>

src/lang/ca.rs

@@ -780,5 +780,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("RustDesk could not load a GStreamer component needed for screen capture ({})", "El RustDesk no ha pogut carregar un component del GStreamer necessari per capturar la pantalla ({})"),
         ("Relay fallback delay in seconds", "Retard abans de recórrer al relé en segons"),
         ("relay-fallback-delay-tip", "Quant de temps espera una connexió de relé ja establerta la connexió directa WebRTC abans d'utilitzar-se en lloc seu. Augmenteu-lo per donar més temps a una connexió directa lenta; reduïu-lo per passar abans al relé en xarxes on no es pot fer una connexió directa. Deixeu-lo buit per al valor predeterminat de 2.5 segons."),
+        ("To start a voice call, enable \"Audio capture\" on the \"Screen share\" page.", "")
     ].iter().cloned().collect();
 }