[Android] Refactor openssl code to separate file and target

Summary:
CommonCpp/DatabaseManagers also makes use of sqlite +
openssl, refactor the logic so that the related openssl gets
moved to it's own file.

https://linear.app/comm/issue/ENG-3002

Depends on D6621

Test Plan:
Android gate passes.

Local dev workflow also works:

# start keyserver and native
(cd keyserver && yarn dev &)
(cd native && yarn dev &)

cd native && yarn react-native run-android

Reviewers: max, atul

Reviewed By: max, atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D6721