Add support for JNI libraries to soong_app_prebuilt.mk

Use install_jni_libs_internal.mk to install JNI libraries alongside
preinstalled APKs.  APKs with embedded JNI libraries are handled
within Soong.

Bug: 80095087
Test: m checkbuild
Change-Id: I2ecf10b6771dff14c940cc6e6442eb2ae43a75b0