ANDROID: usb: add EXPORT_TRACE_SYMBOL to export tracepoint
To use the tracepoint in kernel module, add EXPORT_TRACE_SYMBOL_GPL to export the dwc3_event tracepoint. Bug: 189130101 Change-Id: I3a917af82c9d8c19a085c5fc1a30c1b9af4b6885 Signed-off-by:fengmingli <mingli.feng@vivo.com> (cherry picked from commit fe2ecaf3)
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