[ Merge of http://go/wvgerrit/147275 ]
Swapped out use of OpenSSL/BoringSSL RSA and EC_KEY to use OEMCrypto
reference utility classes RsaPublicKey/EccPublicKey. This enables
further test development with ECC keys, and removes duplicate OpenSSL/
BoringSSL code.
For Android makefiles, only the minimally required files have been
added.
Bug: 205902021
Bug: 236317198
Test: run_prov30_test run_prov40_test oemcrypto_test
Change-Id: I64491018e8ffb69bf986083e3aae446eb9e5cf39