Revert "Cleanup Bitmap JNI"

This reverts commit b2915245b7.

Change-Id: Idd7d7f33eec4ea5024c83de6b10d3d1a6ab2b17a

opengl/java/android/opengl/GLUtils.java

@@ -29,6 +29,14 @@ import javax.microedition.khronos.egl.EGL11;
 
 public final class GLUtils {
 
+    /*
+     * We use a class initializer to allow the native code to cache some
+     * field offsets.
+     */
+    static {
+        nativeClassInit();
+    }
+
     private GLUtils() {
     }
 
@@ -267,6 +275,8 @@ public final class GLUtils {
      */
     native public static void setTracingLevel(int level);
 
+    native private static void nativeClassInit();
+
     native private static int native_getInternalFormat(Bitmap bitmap);
     native private static int native_getType(Bitmap bitmap);
     native private static int native_texImage2D(int target, int level, int internalformat,