remove JNIHelp.h from sqlite_jni.c

sqlite_jni.c doesn't need JNIHelp.h to compile, remove it to avoid
having to pull in liblog to satisify the LOG?_EX definitions.

Change-Id: Iadceea110c0c7e273518e140b898ee4f610a6c67
Merge tag 'tags/android-4.4_r1' into kitkat-staging

Android 4.4 Release 1.0