Remove native support for tracing in host runtime

Android tracing is not needed for host applications, and perfetto is not
supported on all host platforms. This removes android_os_Trace.cpp from
host builds of libandroid_runtime which also removes the need for
libtracing_perfetto to be a dependency for host builds.

Flag: NONE host-only change
Bug: 322360037
Test: build libandroid_runtime on host
Change-Id: I67f1480470d32c0ad98dc136375173159446bb9d