Only build conscrypt_jni for Android build (#715)
Only build conscrypt_jni for Android build (#715)

The BoringSSL CMake files define targets for a number of binaries and
shared libraries, and by default CMake builds everything.  We only
ever use libconscrypt_jni.so, so declare that target to avoid building
unnecessary code.
google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt