Add method for manual cancellation of the plugin.
Add method for manual cancellation of the plugin.

bug: 106757419
Change-Id: I5e64848eba4ba29fcc500d882e5391109d965f35

googleinterns/android-studio-figma-overlay,googleinterns/android-studio-figma-overlay,googleinterns/android-studio-figma-overlay,googleinterns/android-studio-figma-overlay