Store keys in conditional ways for different android versions

[ericlw]

Several ways to store encrypted keys in android. Gets more secure in newer versions, conditionally add this logic for storing the refresh tokens.

[ericlw]

OpenSSL broken on Android N.

Statically linked OpenSSL also broken. Something about a switch to BoringSSL

Investigating solution....

[ericlw]

Problem replacing deprecated Keygen method with the new one

http://stackoverflow.com/questions/36802523/keypairgeneratorspec-replacement-with-keygenparameterspec-builder-equivalents