Remove the concept of TOUCH_MODAL from input

We remove modal windows from input. WM will configure modal windows
itself using touchableRegion.

Bug: 216806304
Test: atest inputflinger_tests
Change-Id: I9593865213216b420ab9b5c5b853298f01dabcc6
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index f5aa45b..58c9303 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -509,8 +509,7 @@
     if (inputConfig.test(WindowInfo::InputConfig::NOT_TOUCHABLE) && !windowCanInterceptTouch) {
         return false;
     }
-    if (!inputConfig.test(WindowInfo::InputConfig::TOUCH_MODAL) &&
-        !windowInfo.touchableRegionContainsPoint(x, y)) {
+    if (!windowInfo.touchableRegionContainsPoint(x, y)) {
         return false;
     }
     return true;