ANDROID: gki_defconfig: enable CONFIG_CRYPTO_GHASH_ARM64_CE

Enable the ARMv8 Crypto Extensions implementation of AES-GCM, as it's an
order of magnitude faster than the generic implementation and is more
secure.  AES-GCM is used by Android's IPSec support
(https://developer.android.com/reference/android/net/IpSecAlgorithm#AUTH_CRYPT_AES_GCM

)
and often is the first choice of algorithm for new purposes as well.

This also makes GKI on arm64 consistent with GKI on x86, as the AES-NI
accelerated AES-GCM is already enabled on x86.  (It is not its own
option on x86, but rather is included in CONFIG_CRYPTO_AES_NI_INTEL.)

Bug: 274721410
Change-Id: I2877192dad8f71a961d6f6f465b62b6aeee69540
Signed-off-by: Eric Biggers <ebiggers@google.com>