diff --git a/services/inputflinger/InputDeviceMetricsCollector.cpp b/services/inputflinger/InputDeviceMetricsCollector.cpp
index 7c99a1c..56a3fb4 100644
--- a/services/inputflinger/InputDeviceMetricsCollector.cpp
+++ b/services/inputflinger/InputDeviceMetricsCollector.cpp
@@ -41,7 +41,13 @@
 
 constexpr size_t INTERACTIONS_QUEUE_CAPACITY = 500;
 
-int32_t linuxBusToInputDeviceBusEnum(int32_t linuxBus) {
+int32_t linuxBusToInputDeviceBusEnum(int32_t linuxBus, bool isUsiStylus) {
+    if (isUsiStylus) {
+        // This is a stylus connected over the Universal Stylus Initiative (USI) protocol.
+        // For metrics purposes, we treat this protocol as a separate bus.
+        return util::INPUT_DEVICE_USAGE_REPORTED__DEVICE_BUS__USI;
+    }
+
     // When adding cases to this switch, also add them to the copy of this method in
     // TouchpadInputMapper.cpp.
     // TODO(b/286394420): deduplicate this method with the one in TouchpadInputMapper.cpp.
@@ -58,11 +64,12 @@
 class : public InputDeviceMetricsLogger {
     nanoseconds getCurrentTime() override { return nanoseconds(systemTime(SYSTEM_TIME_MONOTONIC)); }
 
-    void logInputDeviceUsageReported(const InputDeviceIdentifier& identifier,
+    void logInputDeviceUsageReported(const InputDeviceInfo& info,
                                      const DeviceUsageReport& report) override {
         const int32_t durationMillis =
                 std::chrono::duration_cast<std::chrono::milliseconds>(report.usageDuration).count();
         const static std::vector<int32_t> empty;
+        const auto& identifier = info.getIdentifier();
 
         ALOGD_IF(DEBUG, "Usage session reported for device: %s", identifier.name.c_str());
         ALOGD_IF(DEBUG, "    Total duration: %dms", durationMillis);
@@ -90,7 +97,9 @@
                      durMillis);
         }
         util::stats_write(util::INPUTDEVICE_USAGE_REPORTED, identifier.vendor, identifier.product,
-                          identifier.version, linuxBusToInputDeviceBusEnum(identifier.bus),
+                          identifier.version,
+                          linuxBusToInputDeviceBusEnum(identifier.bus,
+                                                       info.getUsiVersion().has_value()),
                           durationMillis, sources, durationsPerSource, uids, durationsPerUid);
     }
 } sStatsdLogger;
@@ -295,21 +304,21 @@
         if (newDeviceInfos.count(deviceId) != 0) {
             continue;
         }
-        onInputDeviceRemoved(deviceId, info.getIdentifier());
+        onInputDeviceRemoved(deviceId, info);
     }
 
     std::swap(newDeviceInfos, mLoggedDeviceInfos);
 }
 
 void InputDeviceMetricsCollector::onInputDeviceRemoved(DeviceId deviceId,
-                                                       const InputDeviceIdentifier& identifier) {
+                                                       const InputDeviceInfo& info) {
     auto it = mActiveUsageSessions.find(deviceId);
     if (it == mActiveUsageSessions.end()) {
         return;
     }
     // Report usage for that device if there is an active session.
     auto& [_, activeSession] = *it;
-    mLogger.logInputDeviceUsageReported(identifier, activeSession.finishSession());
+    mLogger.logInputDeviceUsageReported(info, activeSession.finishSession());
     mActiveUsageSessions.erase(it);
 
     // We don't remove this from mLoggedDeviceInfos because it will be updated in
@@ -365,8 +374,7 @@
         auto activeSessionIt = mActiveUsageSessions.find(deviceId);
         LOG_ALWAYS_FATAL_IF(activeSessionIt == mActiveUsageSessions.end());
         auto& [_, activeSession] = *activeSessionIt;
-        mLogger.logInputDeviceUsageReported(infoIt->second.getIdentifier(),
-                                            activeSession.finishSession());
+        mLogger.logInputDeviceUsageReported(infoIt->second, activeSession.finishSession());
         mActiveUsageSessions.erase(activeSessionIt);
     }
 }
diff --git a/services/inputflinger/InputDeviceMetricsCollector.h b/services/inputflinger/InputDeviceMetricsCollector.h
index c70e6d4..1f7c5d9 100644
--- a/services/inputflinger/InputDeviceMetricsCollector.h
+++ b/services/inputflinger/InputDeviceMetricsCollector.h
@@ -110,8 +110,7 @@
         UidUsageBreakdown uidBreakdown;
     };
 
-    virtual void logInputDeviceUsageReported(const InputDeviceIdentifier&,
-                                             const DeviceUsageReport&) = 0;
+    virtual void logInputDeviceUsageReported(const InputDeviceInfo&, const DeviceUsageReport&) = 0;
     virtual ~InputDeviceMetricsLogger() = default;
 };
 
@@ -189,7 +188,7 @@
     std::map<DeviceId, ActiveSession> mActiveUsageSessions;
 
     void onInputDevicesChanged(const std::vector<InputDeviceInfo>& infos);
-    void onInputDeviceRemoved(DeviceId deviceId, const InputDeviceIdentifier& identifier);
+    void onInputDeviceRemoved(DeviceId deviceId, const InputDeviceInfo& info);
     using SourceProvider = std::function<std::set<InputDeviceUsageSource>(const InputDeviceInfo&)>;
     void onInputDeviceUsage(DeviceId deviceId, std::chrono::nanoseconds eventTime,
                             const SourceProvider& getSources);
diff --git a/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp b/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
index 986dabb..3e092d3 100644
--- a/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchpadInputMapper.cpp
@@ -175,7 +175,13 @@
     mapper->consumeGesture(gesture);
 }
 
-int32_t linuxBusToInputDeviceBusEnum(int32_t linuxBus) {
+int32_t linuxBusToInputDeviceBusEnum(int32_t linuxBus, bool isUsiStylus) {
+    if (isUsiStylus) {
+        // This is a stylus connected over the Universal Stylus Initiative (USI) protocol.
+        // For metrics purposes, we treat this protocol as a separate bus.
+        return util::INPUT_DEVICE_USAGE_REPORTED__DEVICE_BUS__USI;
+    }
+
     // When adding cases to this switch, also add them to the copy of this method in
     // InputDeviceMetricsCollector.cpp.
     // TODO(b/286394420): deduplicate this method with the one in InputDeviceMetricsCollector.cpp.
@@ -249,8 +255,8 @@
         for (auto& [id, counters] : mCounters) {
             auto [busId, vendorId, productId, versionId] = id;
             addAStatsEvent(outEventList, android::util::TOUCHPAD_USAGE, vendorId, productId,
-                           versionId, linuxBusToInputDeviceBusEnum(busId), counters.fingers,
-                           counters.palms, counters.twoFingerSwipeGestures,
+                           versionId, linuxBusToInputDeviceBusEnum(busId, /*isUsi=*/false),
+                           counters.fingers, counters.palms, counters.twoFingerSwipeGestures,
                            counters.threeFingerSwipeGestures, counters.fourFingerSwipeGestures,
                            counters.pinchGestures);
         }
diff --git a/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp b/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp
index 2ff64c8..7ccfaca 100644
--- a/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp
+++ b/services/inputflinger/tests/InputDeviceMetricsCollector_test.cpp
@@ -53,7 +53,7 @@
 constexpr int32_t POINTER_1_DOWN =
         AMOTION_EVENT_ACTION_POINTER_DOWN | (1 << AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT);
 
-InputDeviceIdentifier getIdentifier(int32_t id = DEVICE_ID) {
+InputDeviceIdentifier generateTestIdentifier(int32_t id = DEVICE_ID) {
     InputDeviceIdentifier identifier;
     identifier.name = DEVICE_NAME + "_" + std::to_string(id);
     identifier.location = LOCATION;
@@ -69,8 +69,8 @@
                                        uint32_t sources = TOUCHSCREEN | STYLUS,
                                        bool isAlphabetic = false) {
     auto info = InputDeviceInfo();
-    info.initialize(id, /*generation=*/1, /*controllerNumber=*/1, getIdentifier(id), "alias",
-                    /*isExternal=*/false, /*hasMic=*/false, ADISPLAY_ID_NONE);
+    info.initialize(id, /*generation=*/1, /*controllerNumber=*/1, generateTestIdentifier(id),
+                    "alias", /*isExternal=*/false, /*hasMic=*/false, ADISPLAY_ID_NONE);
     info.addSource(sources);
     info.setKeyboardType(isAlphabetic ? AINPUT_KEYBOARD_TYPE_ALPHABETIC
                                       : AINPUT_KEYBOARD_TYPE_NON_ALPHABETIC);
@@ -81,6 +81,8 @@
         generateTestDeviceInfo(DEVICE_ID, KEY_SOURCES, /*isAlphabetic=*/true);
 const InputDeviceInfo NON_ALPHABETIC_KEYBOARD_INFO =
         generateTestDeviceInfo(DEVICE_ID, KEY_SOURCES, /*isAlphabetic=*/false);
+const InputDeviceInfo TOUCHSCREEN_STYLUS_INFO = generateTestDeviceInfo(DEVICE_ID);
+const InputDeviceInfo SECOND_TOUCHSCREEN_STYLUS_INFO = generateTestDeviceInfo(DEVICE_ID_2);
 
 std::set<gui::Uid> uids(std::initializer_list<int32_t> vals) {
     std::set<gui::Uid> set;
@@ -351,12 +353,12 @@
     TestInputListener mTestListener;
     InputDeviceMetricsCollector mMetricsCollector{mTestListener, *this, USAGE_TIMEOUT};
 
-    void assertUsageLogged(InputDeviceIdentifier identifier, nanoseconds duration,
+    void assertUsageLogged(const InputDeviceInfo& info, nanoseconds duration,
                            std::optional<SourceUsageBreakdown> sourceBreakdown = {},
                            std::optional<UidUsageBreakdown> uidBreakdown = {}) {
         ASSERT_GE(mLoggedUsageSessions.size(), 1u);
-        const auto& [loggedIdentifier, report] = *mLoggedUsageSessions.begin();
-        ASSERT_EQ(identifier, loggedIdentifier);
+        const auto& [loggedInfo, report] = *mLoggedUsageSessions.begin();
+        ASSERT_EQ(info.getIdentifier(), loggedInfo.getIdentifier());
         ASSERT_EQ(duration, report.usageDuration);
         if (sourceBreakdown) {
             ASSERT_EQ(sourceBreakdown, report.sourceBreakdown);
@@ -387,14 +389,14 @@
     }
 
 private:
-    std::vector<std::tuple<InputDeviceIdentifier, DeviceUsageReport>> mLoggedUsageSessions;
+    std::vector<std::tuple<InputDeviceInfo, DeviceUsageReport>> mLoggedUsageSessions;
     nanoseconds mCurrentTime{TIME};
 
     nanoseconds getCurrentTime() override { return mCurrentTime; }
 
-    void logInputDeviceUsageReported(const InputDeviceIdentifier& identifier,
+    void logInputDeviceUsageReported(const InputDeviceInfo& info,
                                      const DeviceUsageReport& report) override {
-        mLoggedUsageSessions.emplace_back(identifier, report);
+        mLoggedUsageSessions.emplace_back(info, report);
     }
 };
 
@@ -438,7 +440,7 @@
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, LogsSingleEventUsageSession) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
 
     // Device was used.
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
@@ -448,11 +450,11 @@
     setCurrentTime(TIME + USAGE_TIMEOUT);
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
     // The usage session has zero duration because it consisted of only one event.
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(), 0ns));
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 0ns));
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, LogsMultipleEventUsageSession) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
 
     // Device was used.
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
@@ -468,11 +470,11 @@
     // Device was used again after the usage timeout.
     setCurrentTime(TIME + 42ns + 2 * USAGE_TIMEOUT);
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(), 42ns));
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 42ns));
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, RemovingDeviceEndsUsageSession) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
 
     // Device was used.
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
@@ -485,12 +487,12 @@
     // The device was removed before the usage timeout expired.
     setCurrentTime(TIME + 42ns);
     mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {}});
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(), 21ns));
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 21ns));
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, TracksUsageFromDifferentDevicesIndependently) {
     mMetricsCollector.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(), generateTestDeviceInfo(DEVICE_ID_2)}});
+            {/*id=*/0, {TOUCHSCREEN_STYLUS_INFO, SECOND_TOUCHSCREEN_STYLUS_INFO}});
 
     // Device 1 was used.
     setCurrentTime(TIME);
@@ -509,7 +511,7 @@
     // Device 1 was used after its usage timeout expired. Its usage session is reported.
     setCurrentTime(TIME + 300ns + USAGE_TIMEOUT);
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(DEVICE_ID), 100ns));
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 100ns));
 
     // Device 2 was used.
     setCurrentTime(TIME + 350ns + USAGE_TIMEOUT);
@@ -525,13 +527,14 @@
     setCurrentTime(TIME + 400ns + (2 * USAGE_TIMEOUT));
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
     // Since Device 2's usage session ended, its usage should be reported.
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(DEVICE_ID_2), 150ns + USAGE_TIMEOUT));
+    ASSERT_NO_FATAL_FAILURE(
+            assertUsageLogged(SECOND_TOUCHSCREEN_STYLUS_INFO, 150ns + USAGE_TIMEOUT));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, BreakdownUsageBySource) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
     InputDeviceMetricsLogger::SourceUsageBreakdown expectedSourceBreakdown;
 
     // Use touchscreen.
@@ -576,7 +579,7 @@
                                          100ns + USAGE_TIMEOUT);
     // Verify that only one usage session was logged for the device, and that session was broken
     // down by source correctly.
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(),
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO,
                                               400ns + USAGE_TIMEOUT + USAGE_TIMEOUT,
                                               expectedSourceBreakdown));
 
@@ -585,7 +588,7 @@
 
 TEST_F(InputDeviceMetricsCollectorTest, BreakdownUsageBySource_TrackSourceByDevice) {
     mMetricsCollector.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID), generateTestDeviceInfo(DEVICE_ID_2)}});
+            {/*id=*/0, {TOUCHSCREEN_STYLUS_INFO, SECOND_TOUCHSCREEN_STYLUS_INFO}});
     InputDeviceMetricsLogger::SourceUsageBreakdown expectedSourceBreakdown1;
     InputDeviceMetricsLogger::SourceUsageBreakdown expectedSourceBreakdown2;
 
@@ -602,15 +605,15 @@
     expectedSourceBreakdown1.emplace_back(InputDeviceUsageSource::TOUCHSCREEN, 100ns);
     expectedSourceBreakdown2.emplace_back(InputDeviceUsageSource::STYLUS_DIRECT, 100ns);
     ASSERT_NO_FATAL_FAILURE(
-            assertUsageLogged(getIdentifier(DEVICE_ID), 100ns, expectedSourceBreakdown1));
+            assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 100ns, expectedSourceBreakdown1));
     ASSERT_NO_FATAL_FAILURE(
-            assertUsageLogged(getIdentifier(DEVICE_ID_2), 100ns, expectedSourceBreakdown2));
+            assertUsageLogged(SECOND_TOUCHSCREEN_STYLUS_INFO, 100ns, expectedSourceBreakdown2));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, BreakdownUsageBySource_MultiSourceEvent) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo(DEVICE_ID)}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
     InputDeviceMetricsLogger::SourceUsageBreakdown expectedSourceBreakdown;
 
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID, TOUCHSCREEN | STYLUS, //
@@ -634,13 +637,13 @@
     expectedSourceBreakdown.emplace_back(InputDeviceUsageSource::STYLUS_DIRECT, 200ns);
     expectedSourceBreakdown.emplace_back(InputDeviceUsageSource::TOUCHSCREEN, 300ns);
     ASSERT_NO_FATAL_FAILURE(
-            assertUsageLogged(getIdentifier(DEVICE_ID), 400ns, expectedSourceBreakdown));
+            assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 400ns, expectedSourceBreakdown));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, UidsNotTrackedWhenThereIsNoActiveSession) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
 
     // Notify interaction with UIDs before the device is used.
     mMetricsCollector.notifyDeviceInteraction(DEVICE_ID, currentTime(), uids({1}));
@@ -665,14 +668,15 @@
 
     // The first usage session is logged.
     static const UidUsageBreakdown emptyBreakdown;
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(), 100ns, /*sourceBreakdown=*/{},
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 100ns,
+                                              /*sourceBreakdown=*/{},
                                               /*uidBreakdown=*/emptyBreakdown));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, BreakdownUsageByUid) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
     UidUsageBreakdown expectedUidBreakdown;
 
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
@@ -691,14 +695,14 @@
 
     // Remove the device to force the usage session to be logged.
     mMetricsCollector.notifyInputDevicesChanged({});
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(), 200ns, /*sourceBreakdown=*/{},
-                                              expectedUidBreakdown));
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 200ns,
+                                              /*sourceBreakdown=*/{}, expectedUidBreakdown));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());
 }
 
 TEST_F(InputDeviceMetricsCollectorTest, BreakdownUsageByUid_TracksMultipleSessionsForUid) {
-    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {generateTestDeviceInfo()}});
+    mMetricsCollector.notifyInputDevicesChanged({/*id=*/0, {TOUCHSCREEN_STYLUS_INFO}});
     UidUsageBreakdown expectedUidBreakdown;
 
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
@@ -742,7 +746,7 @@
     expectedUidBreakdown.emplace_back(2, 0ns);
     expectedUidBreakdown.emplace_back(3, 100ns);
     expectedUidBreakdown.emplace_back(4, 100ns);
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(), 500ns + USAGE_TIMEOUT,
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 500ns + USAGE_TIMEOUT,
                                               /*sourceBreakdown=*/{}, expectedUidBreakdown));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());
@@ -750,7 +754,7 @@
 
 TEST_F(InputDeviceMetricsCollectorTest, BreakdownUsageByUid_TracksUidsByDevice) {
     mMetricsCollector.notifyInputDevicesChanged(
-            {/*id=*/0, {generateTestDeviceInfo(DEVICE_ID), generateTestDeviceInfo(DEVICE_ID_2)}});
+            {/*id=*/0, {TOUCHSCREEN_STYLUS_INFO, SECOND_TOUCHSCREEN_STYLUS_INFO}});
     UidUsageBreakdown expectedUidBreakdown1;
     UidUsageBreakdown expectedUidBreakdown2;
 
@@ -773,9 +777,9 @@
     expectedUidBreakdown2.emplace_back(1, 100ns);
     expectedUidBreakdown2.emplace_back(3, 100ns);
     mMetricsCollector.notifyMotion(generateMotionArgs(DEVICE_ID));
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(DEVICE_ID), 200ns,
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(TOUCHSCREEN_STYLUS_INFO, 200ns,
                                               /*sourceBreakdown=*/{}, expectedUidBreakdown1));
-    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(getIdentifier(DEVICE_ID_2), 100ns,
+    ASSERT_NO_FATAL_FAILURE(assertUsageLogged(SECOND_TOUCHSCREEN_STYLUS_INFO, 100ns,
                                               /*sourceBreakdown=*/{}, expectedUidBreakdown2));
 
     ASSERT_NO_FATAL_FAILURE(assertUsageNotLogged());