Fix Target Specific Signals Parsing (#240)

---
Signed-off-by: Kartik Nema <kartnema@qti.qualcomm.com>

Author: kartnema

resource-tuner/init/RestuneParser.cpp

@@ -111,6 +111,7 @@ static int8_t isKey(const std::string& keyName) {
         SIGNAL_CONFIGS_ROOT,
         SIGNAL_CONFIGS_ELEM_SIGID,
         SIGNAL_CONFIGS_ELEM_CATEGORY,
+        SIGNAL_CONFIGS_ELEM_SIGTYPE,
         SIGNAL_CONFIGS_ELEM_NAME,
         SIGNAL_CONFIGS_ELEM_ENABLE,
         SIGNAL_CONFIGS_ELEM_TIMEOUT,