Cleanup: Block untrusted touches in InputDispatcher

This change removes the BlockUntrustedTouchesMode enum, and related
code, as block_untrusted_touches is now always enforced

Fix: 169067926
Test: atest WindowUntrustedTouchTest
Change-Id: Ie039fb06c2ee7e03d726545190e4e75f58978066
diff --git a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
index d7bc5fb..c7723d0 100644
--- a/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
+++ b/services/inputflinger/dispatcher/include/InputDispatcherInterface.h
@@ -20,7 +20,7 @@
 #include <InputListener.h>
 #include <android-base/result.h>
 #include <android/gui/FocusRequest.h>
-#include <android/os/BlockUntrustedTouchesMode.h>
+
 #include <android/os/InputEventInjectionResult.h>
 #include <android/os/InputEventInjectionSync.h>
 #include <gui/InputApplication.h>
@@ -136,13 +136,6 @@
      */
     virtual void setMaximumObscuringOpacityForTouch(float opacity) = 0;
 
-    /**
-     * Sets the mode of the block untrusted touches feature.
-     *
-     * TODO(b/169067926): Clean-up feature modes.
-     */
-    virtual void setBlockUntrustedTouchesMode(android::os::BlockUntrustedTouchesMode mode) = 0;
-
     /* Transfers touch focus from one window to another window.
      *
      * Returns true on success.  False if the window did not actually have touch focus.