Add vendor

Specifically because I want to modify a dependency

vendor/golang.org/x/mobile/app/GoNativeActivity.java

@@ -0,0 +1,67 @@
+package org.golang.app;
+
+import android.app.Activity;
+import android.app.NativeActivity;
+import android.content.Context;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.KeyCharacterMap;
+
+public class GoNativeActivity extends NativeActivity {
+	private static GoNativeActivity goNativeActivity;
+
+	public GoNativeActivity() {
+		super();
+		goNativeActivity = this;
+	}
+
+	String getTmpdir() {
+		return getCacheDir().getAbsolutePath();
+	}
+
+	static int getRune(int deviceId, int keyCode, int metaState) {
+		try {
+			int rune = KeyCharacterMap.load(deviceId).get(keyCode, metaState);
+			if (rune == 0) {
+				return -1;
+			}
+			return rune;
+		} catch (KeyCharacterMap.UnavailableException e) {
+			return -1;
+		} catch (Exception e) {
+			Log.e("Go", "exception reading KeyCharacterMap", e);
+			return -1;
+		}
+	}
+
+	private void load() {
+		// Interestingly, NativeActivity uses a different method
+		// to find native code to execute, avoiding
+		// System.loadLibrary. The result is Java methods
+		// implemented in C with JNIEXPORT (and JNI_OnLoad) are not
+		// available unless an explicit call to System.loadLibrary
+		// is done. So we do it here, borrowing the name of the
+		// library from the same AndroidManifest.xml metadata used
+		// by NativeActivity.
+		try {
+			ActivityInfo ai = getPackageManager().getActivityInfo(
+					getIntent().getComponent(), PackageManager.GET_META_DATA);
+			if (ai.metaData == null) {
+				Log.e("Go", "loadLibrary: no manifest metadata found");
+				return;
+			}
+			String libName = ai.metaData.getString("android.app.lib_name");
+			System.loadLibrary(libName);
+		} catch (Exception e) {
+			Log.e("Go", "loadLibrary failed", e);
+		}
+	}
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		load();
+		super.onCreate(savedInstanceState);
+	}
+}