Change masked_tag() return type to match BoringSSL change.

Did some static analysis and this seems quite safe, this method
casts a fixed size type to the API type expected by BoringSSL,
which is now int on both 32 and 64 bit build.

Test: atest keymaster_tests
Change-Id: Ia4cd71464cf232ce9e7946aaa7215ef1d79070e1
1 file changed