Add dependency on jni_headers to libjvmtiattachingtestagents

Preparation for removing implicit include paths for jni.h from soong.

Bug: 152482542
Test: m checkbuild
Change-Id: Idb487615344baa8d98b7d5719b3316c3c170c3b1
Exempt-From-Owner-Approval: build refactoring
1 file changed