IMS-VT: Build and install libvt_jni and libimscamera_jni

libvt_jni and libimscamera_jni are used by IMS phone.
Build and install libvt_jni and libimscamera_jni with Phone.

Change-Id: I0a962dc3891fb56dd5ee63b26cf0239bc60d33b6
CRs-Fixed: 569101