power-mediatek: Set low power state upon initialisation of Power HAL

Change-Id: Idddd14756e73b053905e184b11490d757492423a
diff --git a/aidl/power-mediatek/Power.cpp b/aidl/power-mediatek/Power.cpp
index 9f0868f..41b35fe 100644
--- a/aidl/power-mediatek/Power.cpp
+++ b/aidl/power-mediatek/Power.cpp
@@ -94,6 +94,7 @@
         abort();
     }
 
+    mLowPowerEnabled = 0;
     libpowerhal_Init(1);
 }