Associate device id with isSlippery

Because we have supported multi-device event streams in the
InputDispatcher, but there are still some logics that use the previous
single-device stream logic. Here, associating isSlippery with deviceId
can solve event slip to wrong window.

Bug: 328553381
Test: atest inputflinger_tests

Change-Id: I7319d7e7f897c86975708ff3063a52b48c91888b
Signed-off-by: Linnan Li <lilinnan@xiaomi.corp-partner.google.com>
diff --git a/services/inputflinger/dispatcher/TouchState.cpp b/services/inputflinger/dispatcher/TouchState.cpp
index 15eef20..296c334 100644
--- a/services/inputflinger/dispatcher/TouchState.cpp
+++ b/services/inputflinger/dispatcher/TouchState.cpp
@@ -192,10 +192,13 @@
     return nullptr;
 }
 
-bool TouchState::isSlippery() const {
+bool TouchState::isSlippery(DeviceId deviceId) const {
     // Must have exactly one foreground window.
     bool haveSlipperyForegroundWindow = false;
     for (const TouchedWindow& window : windows) {
+        if (!window.hasTouchingPointers(deviceId)) {
+            continue;
+        }
         if (window.targetFlags.test(InputTarget::Flags::FOREGROUND)) {
             if (haveSlipperyForegroundWindow ||
                 !window.windowHandle->getInfo()->inputConfig.test(