MainAndroid: Allow specifying path for savestates

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java

@@ -297,6 +297,13 @@ public final class NativeLibrary
 	 */
 	public static native void SaveState(int slot);
 
+	/**
+	 * Saves a game state to the specified path.
+	 *
+	 * @param path  The path to save state to.
+	 */
+	public static native void SaveStateAs(String path);
+
 	/**
 	 * Loads a game state from the slot number.
 	 *
@@ -304,6 +311,13 @@ public final class NativeLibrary
 	 */
 	public static native void LoadState(int slot);
 
+	/**
+	 * Loads a game state from the specified path.
+	 *
+	 * @param path  The path to load state from.
+	 */
+	public static native void LoadStateAs(String path);
+
 	/**
 	 * Sets the current working user directory
 	 * If not set, it auto-detects a location