[Android] Rewrite settings UI.

Source/Android/app/src/arm_64/res/values/arrays.xml

@@ -9,10 +9,10 @@
         <item>@string/cached_interpreter</item>
         <item>@string/jit_arm64_recompiler</item>
     </string-array>
-    <string-array name="int_emu_cores" translatable="false">
+    <integer-array name="int_emu_cores" translatable="false">
         <item>0</item>
         <item>5</item>
         <item>4</item>
-    </string-array>
+    </integer-array>
 
 </resources>

Source/Android/app/src/main/AndroidManifest.xml

@@ -56,9 +56,9 @@
             android:label="@string/add_directory_title"/>
 
         <activity
-            android:name=".activities.SettingsActivity"
+            android:name=".ui.settings.SettingsActivity"
             android:theme="@style/DolphinSettingsGamecube"
-            android:label="@string/grid_menu_settings"/>
+            android:label="@string/grid_menu_core_settings"/>
 
         <activity
             android:name=".activities.EmulationActivity"
@@ -71,8 +71,6 @@
 
         <service android:name=".services.AssetCopyService"/>
 
-        <service android:name=".services.SettingsSaveService"/>
-
         <provider
             android:name=".model.GameProvider"
             android:authorities="${applicationId}.provider"

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/model/settings/BooleanSetting.java

@@ -0,0 +1,28 @@
+package org.dolphinemu.dolphinemu.model.settings;
+
+public final class BooleanSetting extends Setting
+{
+	private boolean mValue;
+
+	public BooleanSetting(String key, String section, boolean value)
+	{
+		super(key, section);
+		mValue = value;
+	}
+
+	public boolean getValue()
+	{
+		return mValue;
+	}
+
+	public void setValue(boolean value)
+	{
+		mValue = value;
+	}
+
+	@Override
+	public String getValueAsString()
+	{
+		return mValue ? "True" : "False";
+	}
+}

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/model/settings/FloatSetting.java

@@ -0,0 +1,28 @@
+package org.dolphinemu.dolphinemu.model.settings;
+
+public final class FloatSetting extends Setting
+{
+	private float mValue;
+
+	public FloatSetting(String key, String section, float value)
+	{
+		super(key, section);
+		mValue = value;
+	}
+
+	public float getValue()
+	{
+		return mValue;
+	}
+
+	public void setValue(float value)
+	{
+		mValue = value;
+	}
+
+	@Override
+	public String getValueAsString()
+	{
+		return Float.toString(mValue);
+	}
+}

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/model/settings/IntSetting.java

@@ -0,0 +1,28 @@
+package org.dolphinemu.dolphinemu.model.settings;
+
+public final class IntSetting extends Setting
+{
+	private int mValue;
+
+	public IntSetting(String key, String section, int value)
+	{
+		super(key, section);
+		mValue = value;
+	}
+
+	public int getValue()
+	{
+		return mValue;
+	}
+
+	public void setValue(int value)
+	{
+		mValue = value;
+	}
+
+	@Override
+	public String getValueAsString()
+	{
+		return Integer.toString(mValue);
+	}
+}

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/model/settings/Setting.java

@@ -0,0 +1,48 @@
+package org.dolphinemu.dolphinemu.model.settings;
+
+/**
+ * Abstraction for a setting item as read from / written to Dolphin's configuration ini files.
+ * These files generally consist of a key/value pair, though the type of value is ambiguous and
+ * must be inferred at read-time. The type of value determines which child of this class is used
+ * to represent the Setting.
+ */
+public abstract class Setting
+{
+	private String mKey;
+	private String mSection;
+
+	/**
+	 * Base constructor.
+	 *
+	 * @param key     Everything to the left of the = in a line from the ini file.
+	 * @param section The corresponding recent section header; e.g. [Core] or [Enhancements] without the brackets.
+	 */
+	public Setting(String key, String section)
+	{
+		mKey = key;
+		mSection = section;
+	}
+
+	/**
+	 *
+	 * @return The identifier used to write this setting to the ini file.
+	 */
+	public String getKey()
+	{
+		return mKey;
+	}
+
+	/**
+	 *
+	 * @return The name of the header under which this Setting should be written in the ini file.
+	 */
+	public String getSection()
+	{
+		return mSection;
+	}
+
+	/**
+	 * @return A representation of this Setting's backing value converted to a String (e.g. for serialization).
+	 */
+	public abstract String getValueAsString();
+}