Prevent false touch when folding device (1/2)

This CL will add new api to cancel current touch when fold transition
started.

Bug: 203549969
Test: atest inputflinger_tests
Change-Id: Ic62bfc04fc126d9d766cc028c53c6d1f60ff5544
diff --git a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
index 714e7a0..c469ec3 100644
--- a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
+++ b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
@@ -211,6 +211,11 @@
      * Called when a display has been removed from the system.
      */
     virtual void displayRemoved(int32_t displayId) = 0;
+
+    /*
+     * Abort the current touch stream.
+     */
+    virtual void cancelCurrentTouch() = 0;
 };
 
 } // namespace android