KeyMint HAL: add curve 25519, bump version

Marked as required for TRUSTED_ENVIRONMENT impls but not STRONGBOX.

Bump keymint HAL version 1->2 in defaults and in current compatibility
matrix.

Bug: 194358913
Test: build
Change-Id: Ibf2325329f0656a2d1fc416c2f9a74d505d0bf20
7 files changed