ANDROID: cuttlefish_defconfig: Enable CONFIG_ARM64_LSE_ATOMICS

Enabling this was previously blocked by a lack of support for this
feature in clang, but that problem has been resolved in a newer version
of the compiler.

Bug: 120439617
Change-Id: I0f5fd2439c5a71ee0988648970576b46b2c4d20b
Signed-off-by: Alistair Strachan <astrachan@google.com>