Delete TouchState::deviceId

We are doing per-device pointer tracking now, so this CL helps remove
the assumptions around having a single active device.

For now, the behaviour is preserved. In the future, we will not need to
check the currently active device at the TouchState level.

Bug: 211379801
Test: m inputflinger_tests && $ANDROID_HOST_OUT/nativetest64/inputflinger_tests/inputflinger_tests
Change-Id: Ie13e9c93eefc04c2955de3b8a06c9c2da28c9d72
diff --git a/services/inputflinger/dispatcher/TouchedWindow.cpp b/services/inputflinger/dispatcher/TouchedWindow.cpp
index 6ab97f8..ae16520 100644
--- a/services/inputflinger/dispatcher/TouchedWindow.cpp
+++ b/services/inputflinger/dispatcher/TouchedWindow.cpp
@@ -134,6 +134,14 @@
     return deviceIds;
 }
 
+std::set<int32_t> TouchedWindow::getActiveDeviceIds() const {
+    std::set<int32_t> out;
+    for (const auto& [deviceId, _] : mDeviceStates) {
+        out.emplace(deviceId);
+    }
+    return out;
+}
+
 bool TouchedWindow::hasPilferingPointers(int32_t deviceId) const {
     const auto stateIt = mDeviceStates.find(deviceId);
     if (stateIt == mDeviceStates.end()) {