ANDROID: ABI: Update kvm_hyp_iommu ABI

Structure is deduplicated, leaving only opaque "u32 lock" that is ABI
compatible with both structure definitions.

type 'struct kvm_hyp_iommu' changed
  member changed from 'hyp_spinlock_t lock' to 'u32 lock'
    type changed from 'hyp_spinlock_t' = 'union hyp_spinlock' to 'u32' = '__u32' = 'unsigned int'
      resolved type changed from 'union hyp_spinlock' to 'unsigned int'

type 'struct kvm_hyp_iommu' changed
  member 'u32 unused' was removed
  member 'u32 lock' was added

Bug: 350677978
Change-Id: I0ef3a3cea5f7fad7d5eed9e4365fe9c00b42bd7f
Signed-off-by: Aleksei Vetrov <vvvvvv@google.com>