SubGhz: Unit_test and bugfixes (#1104)

* SubGhz: CLI add "subghz decode_raw"
* SubGhz: unit_test
* SubGhz: add Hormann_hsm_raw unit_test
* SubGhz: fix duration raw
* Unit_test: fix total test timer
* SubGHz: fix name display scher_khan
* SubGhz: fix deviation protocol kia
* SubGhz: return max name length to previous value
* FuriHal: correctly handle mute in speaker
* UnitTests: fix grammar in subghz

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

firmware/targets/f7/furi_hal/furi_hal_speaker.c

@@ -21,6 +21,10 @@ void furi_hal_speaker_init() {
 }
 
 void furi_hal_speaker_start(float frequency, float volume) {
+    if(volume == 0) {
+        return;
+    }
+
     if(volume < 0) volume = 0;
     if(volume > 1) volume = 1;
     volume = volume * volume * volume;