Add back RS::init(const char*, uint32_t)

Bug: 26202632
Change-Id: Ia6610623fe8444abfbe95f8d3170b9ed9677d526
diff --git a/cpp/rsCppStructs.h b/cpp/rsCppStructs.h
index 17886ec..cb91216 100644
--- a/cpp/rsCppStructs.h
+++ b/cpp/rsCppStructs.h
@@ -361,10 +361,19 @@
      * @param[in] name Directory name to be used by this context. This should be equivalent to
      * Context.getCacheDir().
      * @param[in] flags Optional flags for this context.
-     * @param[in] targetApi Optional target RS API level. (Default 0: Using the latest SDK/Platform API).
      * @return true on success
      */
-    bool init(const char * name, uint32_t flags = 0, int targetApi = 0);
+    bool init(const char * name, uint32_t flags = 0);
+
+    /**
+     * Initializes a RenderScript context. A context must be initialized before it can be used.
+     * @param[in] name Directory name to be used by this context. This should be equivalent to
+     * Context.getCacheDir().
+     * @param[in] flags Flags for this context.
+     * @param[in] targetApi Target RS API level.
+     * @return true on success
+     */
+    bool init(const char * name, uint32_t flags, int targetApi);
 
     /**
      * Sets the error handler function for this context. This error handler is