ALLJOYN-1973 Must define GTEST_OS_LINUX_ANDROID for unit tests

GTEST_OS_LINUX_ANDROID must be defined for the when building the google
test or we get a compilation error reported from the function wcscasecmp
is encountered.

Change-Id: I11e5bce5cf35e163f799962096fc1eac99e68918
ALLJOYN-2442: Replace Crypto_ScopedLock with OpenSSL's locking
callback.

This fixes possible deadlock with the Crypto_ScopedLock usage.

Change-Id: I0e177b1c740f8f1e1a70b4eb9a09853f94d55cb8