[Android] Add a fastmem option to the cpu options, default disabled.

Source/Android/res/values/strings.xml

@@ -72,6 +72,8 @@
     <string name="emu_core_to_use">Emulation core to use</string>
     <string name="dual_core">Dual Core</string>
     <string name="dual_core_descrip">Split workload to two CPU cores instead of one. Increases speed.</string>
+    <string name="fastmem">Fastmem</string>
+    <string name="fastmem_desc">Uses potentially unsafe optimizations for memory access.</string>
     <string name="video_settings">Video</string>
     <string name="software_renderer">Software Renderer</string>
     <string name="opengl_es3">OpenGL ES 3</string>

Source/Android/res/xml/cpu_prefs.xml

@@ -10,5 +10,9 @@
         android:key="cpuCorePref"
         android:summary="@string/emu_core_to_use"
         android:title="@string/cpu_core" />
+    <CheckBoxPreference
+            android:key="fastmemPref"
+            android:summary="@string/fastmem_desc"
+            android:title="@string/fastmem" />
 
 </PreferenceScreen>

Source/Android/src/org/dolphinemu/dolphinemu/settings/UserPreferences.java

@@ -36,6 +36,7 @@ public static void LoadDolphinConfigToPrefs(Context ctx)
 		// Add the settings.
 		editor.putString("cpuCorePref",   getConfig("Dolphin.ini", "Core", "CPUCore", "3"));
 		editor.putBoolean("dualCorePref", getConfig("Dolphin.ini", "Core", "CPUThread", "False").equals("True"));
+		editor.putBoolean("fastmemPref", getConfig("Dolphin.ini", "Core", "Fastmem", "False").equals("True"));
 
 		editor.putString("gpuPref",               getConfig("Dolphin.ini", "Core", "GFXBackend", "Software Renderer"));
 		editor.putBoolean("showFPS",              getConfig("gfx_opengl.ini", "Settings", "ShowFPS", "False").equals("True"));
@@ -118,6 +119,9 @@ public static void SaveConfigToDolphinIni(Context ctx)
 		// Current CPU core being used. Falls back to interpreter upon error.
 		String currentEmuCore   = prefs.getString("cpuCorePref", "0");
 
+		// Fastmem JIT core usage
+		boolean isUsingFastmem = prefs.getBoolean("fastmemPref", false);
+
 		// Current video backend being used. Falls back to software rendering upon error.
 		String currentVideoBackend = prefs.getString("gpuPref", "Software Rendering");
 
@@ -173,6 +177,7 @@ public static void SaveConfigToDolphinIni(Context ctx)
 		// CPU related Settings
 		NativeLibrary.SetConfig("Dolphin.ini", "Core", "CPUCore", currentEmuCore);
 		NativeLibrary.SetConfig("Dolphin.ini", "Core", "CPUThread", isUsingDualCore ? "True" : "False");
+		NativeLibrary.SetConfig("Dolphin.ini", "Core", "Fastmem", isUsingFastmem ? "True" : "False");
 
 		// General Video Settings
 		NativeLibrary.SetConfig("Dolphin.ini", "Core", "GFXBackend", currentVideoBackend);