[automerged blank] Ed25519: Indicate Android Keystore supports it 2p: ac6337794f

Blank merge reason: Change-Id I5bf85529f75f63113c86437ee21dc1927036099f with SHA-1 c6ec3dfa73 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/libcore/+/18672726

Bug: 233703641
Bug: 232369345
Change-Id: I5d2697569d6feb28f4444e9847621d6702e64e2c
Merged-In: I5bf85529f75f63113c86437ee21dc1927036099f