Disable compilation based on vold.decrypt. [frameworks/base]

Bug: 15165413

(cherry picked from commit 4fd561637a173c7fa6a1d71e9115db1db90514ff)

Change-Id: I2a13b63f9d4a7ffd69a8d21666c6dce84739c6ed
diff --git a/include/android_runtime/AndroidRuntime.h b/include/android_runtime/AndroidRuntime.h
index 379cabc..51e47e6 100644
--- a/include/android_runtime/AndroidRuntime.h
+++ b/include/android_runtime/AndroidRuntime.h
@@ -116,6 +116,7 @@
 
 private:
     static int startReg(JNIEnv* env);
+    void addOption(const char* optionString, void* extra_info = NULL);
     bool parseRuntimeOption(const char* property,
                             char* buffer,
                             const char* runtimeArg,