Port JNIHelp changes to GL stubs

https://android-review.googlesource.com/#/c/platform/frameworks/base/+/439339/
changed some files that were actually auto-generated.  Port the JNIHelp
path change back to the stubs.

Test: Update frameworks/base/core/jni/ and build
Change-Id: I8c6ed256b08519718e5a7cfe005fd8a8df5a9271