Add "Steps per hour" system setting (#211)

* Implements a steps per hour (global) setting that gets returned by PTM GetStepHistory

* Make setting label text clearer

* Add setting to SDL frontend

* Add setting to Android (no UI)

* Remove IntSetting enum value

* Follow convension in android default ini

src/android/app/src/main/jni/config.cpp

@@ -223,6 +223,7 @@ void Config::ReadValues() {
     ReadSetting("System", Settings::values.init_ticks_override);
     ReadSetting("System", Settings::values.plugin_loader_enabled);
     ReadSetting("System", Settings::values.allow_plugin_loader);
+    ReadSetting("System", Settings::values.steps_per_hour);
 
     // Camera
     using namespace Service::CAM;

src/android/app/src/main/jni/default_ini.h

@@ -307,6 +307,10 @@ init_ticks_type =
 # Defaults to 0.
 init_ticks_override =
 
+# Number of steps per hour reported by the pedometer.
+# Defaults to 0.
+steps_per_hour =
+
 # Plugin loader state, if enabled plugins will be loaded from the SD card.
 # You can also set if homebrew apps are allowed to enable the plugin loader
 plugin_loader =