[FL-2149] SubGhz: Additional frequencies for testing (#920)

* SubGhz: add new frequency for testing
* [FL-2149] SubGhz: power reduction for Australia

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

applications/subghz/helpers/subghz_testing.c

@@ -0,0 +1,34 @@
+#include "subghz_testing.h"
+
+const uint32_t subghz_frequencies_testing[] = {
+    /* 300 - 348 */
+    300000000,
+    304500000,
+    313250000,
+    315000000,
+    321950000,
+    348000000,
+    /* 387 - 464 */
+    387000000,
+    433075000, /* LPD433 first */
+    433825000,
+    433920000, /* LPD433 mid */
+    434420000,
+    434775000, /* LPD433 last channels */
+    438900000,
+    464000000,
+    /* 779 - 928 */
+    779000000,
+    868150000,
+    868350000,
+    868550000,
+    915000000,
+    925000000,
+    926500000,
+    927950000,
+    928000000,
+};
+
+const uint32_t subghz_frequencies_count_testing =
+    sizeof(subghz_frequencies_testing) / sizeof(uint32_t);
+const uint32_t subghz_frequencies_433_92_testing = 9;