Build libsimplejni using SDK

The lib hasn't been built using SDK and thus has been causing link-type
check warning from SimpleJNI which is built using SDK. Since the warning
will turn into error soon, fixing the warning by correctly building the
lib with SDK.

Bug: 69899800
Test: m -j SimpleJNI is successful and does not show any link-type check
warning

Change-Id: I51edfe296c70ac99ac7698b5e06ec0e0c678945c