ANDROID: KVM: arm64: use hyp_trace_raw_fops for trace_pipe_raw

The trace_pipe_raw interface is expected to return binary trace format,
while hyp_trace_pipe_fops returns the text trace format. This patch
change trace_pipe_raw fops hyp_trace_raw_fops which provides the binary
output.

Bug: 428904926
Test: presubmit
Change-Id: Id72d2c7df366934f00b17674078c94c2b2d288be
Signed-off-by: Nikita Ioffe <ioffe@google.com>