diff --git a/audio/aidl/common/include/Utils.h b/audio/aidl/common/include/Utils.h
index d87bbd4..32c36b8 100644
--- a/audio/aidl/common/include/Utils.h
+++ b/audio/aidl/common/include/Utils.h
@@ -19,6 +19,7 @@
 #include <algorithm>
 #include <array>
 #include <initializer_list>
+#include <regex>
 #include <type_traits>
 
 #include <aidl/android/media/audio/common/AudioChannelLayout.h>
@@ -133,6 +134,18 @@
            kValidAudioModes.end();
 }
 
+static inline bool maybeVendorExtension(const std::string& s) {
+    // Only checks whether the string starts with the "vendor prefix".
+    static const std::string vendorPrefix = "VX_";
+    return s.size() > vendorPrefix.size() && s.substr(0, vendorPrefix.size()) == vendorPrefix;
+}
+
+static inline bool isVendorExtension(const std::string& s) {
+    // Must be the same as defined in {Playback|Record}TrackMetadata.aidl
+    static const std::regex vendorExtension("VX_[A-Z0-9]{3,}_[_A-Z0-9]+");
+    return std::regex_match(s.begin(), s.end(), vendorExtension);
+}
+
 // The helper functions defined below are only applicable to the case when an enum type
 // specifies zero-based bit positions, not bit masks themselves. This is why instantiation
 // is restricted to certain enum types.
diff --git a/audio/aidl/default/EffectThread.cpp b/audio/aidl/default/EffectThread.cpp
index 024c0ea..4f8fb3c 100644
--- a/audio/aidl/default/EffectThread.cpp
+++ b/audio/aidl/default/EffectThread.cpp
@@ -34,13 +34,14 @@
 };
 
 RetCode EffectThread::createThread(std::shared_ptr<EffectContext> context, const std::string& name,
-                                   const int priority) {
+                                   int priority, int sleepUs /* kSleepTimeUs */) {
     if (mThread.joinable()) {
         LOG(WARNING) << __func__ << " thread already created, no-op";
         return RetCode::SUCCESS;
     }
     mName = name;
     mPriority = priority;
+    mSleepTimeUs = sleepUs;
     {
         std::lock_guard lg(mThreadMutex);
         mThreadContext = std::move(context);
@@ -134,7 +135,7 @@
         LOG(DEBUG) << __func__ << " done processing, effect consumed " << status.fmqConsumed
                    << " produced " << status.fmqProduced;
     } else {
-        // TODO: maybe add some sleep here to avoid busy waiting
+        usleep(mSleepTimeUs);
     }
 }
 
diff --git a/audio/aidl/default/include/effect-impl/EffectThread.h b/audio/aidl/default/include/effect-impl/EffectThread.h
index 9b1a75b..f9c6a31 100644
--- a/audio/aidl/default/include/effect-impl/EffectThread.h
+++ b/audio/aidl/default/include/effect-impl/EffectThread.h
@@ -35,7 +35,7 @@
 
     // called by effect implementation.
     RetCode createThread(std::shared_ptr<EffectContext> context, const std::string& name,
-                         const int priority = ANDROID_PRIORITY_URGENT_AUDIO);
+                         int priority = ANDROID_PRIORITY_URGENT_AUDIO, int sleepUs = kSleepTimeUs);
     RetCode destroyThread();
     RetCode startThread();
     RetCode stopThread();
@@ -72,7 +72,8 @@
     virtual void process_l() REQUIRES(mThreadMutex);
 
   private:
-    const int kMaxTaskNameLen = 15;
+    static constexpr int kMaxTaskNameLen = 15;
+    static constexpr int kSleepTimeUs = 2000;  // in micro-second
     std::mutex mThreadMutex;
     std::condition_variable mCv;
     bool mExit GUARDED_BY(mThreadMutex) = false;
@@ -80,6 +81,7 @@
     std::shared_ptr<EffectContext> mThreadContext GUARDED_BY(mThreadMutex);
     std::thread mThread;
     int mPriority;
+    int mSleepTimeUs = kSleepTimeUs;  // sleep time in micro-second
     std::string mName;
 
     RetCode handleStartStop(bool stop);
diff --git a/audio/common/all-versions/default/HidlUtils.h b/audio/common/all-versions/default/HidlUtils.h
index ad9dee2..844a651 100644
--- a/audio/common/all-versions/default/HidlUtils.h
+++ b/audio/common/all-versions/default/HidlUtils.h
@@ -81,7 +81,7 @@
 #endif
 
 #if MAJOR_VERSION >= 7
-    static constexpr char sAudioTagSeparator = ';';
+    static constexpr char sAudioTagSeparator = AUDIO_ATTRIBUTES_TAGS_SEPARATOR;
 
     static status_t audioChannelMaskFromHal(audio_channel_mask_t halChannelMask, bool isInput,
                                             AudioChannelMask* channelMask);
diff --git a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
index 4d7bb79..d5cb729 100644
--- a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -1946,7 +1946,8 @@
      * Represents property for Seat easy access feature.
      *
      * If true, the seat will automatically adjust to make it easier for the occupant to enter and
-     * exit the vehicle.
+     * exit the vehicle. Each area ID must map to the seat that the user is trying to enter/exit
+     * with the help of the easy access feature.
      *
      * @change_mode VehiclePropertyChangeMode.ON_CHANGE
      * @access VehiclePropertyAccess.READ_WRITE
diff --git a/gatekeeper/OWNERS b/gatekeeper/OWNERS
index fddc2ff..5262dce 100644
--- a/gatekeeper/OWNERS
+++ b/gatekeeper/OWNERS
@@ -1,4 +1,6 @@
 # Bug component: 1124862
-swillden@google.com
+drysdale@google.com
 guangzhu@google.com
+oarbildo@google.com
 subrahmanyaman@google.com
+swillden@google.com
diff --git a/gnss/common/utils/default/DeviceFileReader.cpp b/gnss/common/utils/default/DeviceFileReader.cpp
index dfc086a..91e75eb 100644
--- a/gnss/common/utils/default/DeviceFileReader.cpp
+++ b/gnss/common/utils/default/DeviceFileReader.cpp
@@ -32,40 +32,52 @@
         return;
     }
 
-    int mGnssFd = open(deviceFilePath.c_str(), O_RDWR | O_NONBLOCK);
-
-    if (mGnssFd == -1) {
+    int gnss_fd, epoll_fd;
+    if ((gnss_fd = open(deviceFilePath.c_str(), O_RDWR | O_NONBLOCK)) == -1) {
+        return;
+    }
+    if (write(gnss_fd, command.c_str(), command.size()) <= 0) {
+        close(gnss_fd);
         return;
     }
 
-    int bytes_write = write(mGnssFd, command.c_str(), command.size());
-    if (bytes_write <= 0) {
-        close(mGnssFd);
+    // Create an epoll instance.
+    if ((epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0) {
+        close(gnss_fd);
         return;
     }
 
+    // Add file descriptor to epoll instance.
     struct epoll_event ev, events[1];
-    ev.data.fd = mGnssFd;
+    memset(&ev, 0, sizeof(ev));
+    ev.data.fd = gnss_fd;
     ev.events = EPOLLIN;
-    int epoll_fd = epoll_create1(0);
-    epoll_ctl(epoll_fd, EPOLL_CTL_ADD, mGnssFd, &ev);
+    if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, gnss_fd, &ev) == -1) {
+        close(gnss_fd);
+        close(epoll_fd);
+        return;
+    }
+
+    // Wait for device file event.
+    if (epoll_wait(epoll_fd, events, 1, mMinIntervalMs) == -1) {
+        close(gnss_fd);
+        close(epoll_fd);
+        return;
+    }
+
+    // Handle event and write data to string buffer.
     int bytes_read = -1;
     std::string inputStr = "";
-    int epoll_ret = epoll_wait(epoll_fd, events, 1, mMinIntervalMs);
-
-    if (epoll_ret == -1) {
-        close(mGnssFd);
-        return;
-    }
     while (true) {
         memset(inputBuffer, 0, INPUT_BUFFER_SIZE);
-        bytes_read = read(mGnssFd, &inputBuffer, INPUT_BUFFER_SIZE);
+        bytes_read = read(gnss_fd, &inputBuffer, INPUT_BUFFER_SIZE);
         if (bytes_read <= 0) {
             break;
         }
         s_buffer_ += std::string(inputBuffer, bytes_read);
     }
-    close(mGnssFd);
+    close(gnss_fd);
+    close(epoll_fd);
 
     // Trim end of file mark(\n\n\n\n).
     auto pos = s_buffer_.find("\n\n\n\n");
diff --git a/security/keymint/aidl/vts/functional/AttestKeyTest.cpp b/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
index bbf3633..8ffc179 100644
--- a/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
+++ b/security/keymint/aidl/vts/functional/AttestKeyTest.cpp
@@ -172,8 +172,9 @@
     //     allowing it to be launched with Android S (or later) with Keymaster 4.0
     //     in StrongBox
     void check_skip_test(void) const {
-        if (is_attest_key_feature_disabled() && is_strongbox_enabled() &&
-            is_chipset_allowed_km4_strongbox()) {
+        // Check the chipset first as that doesn't require a round-trip to Package Manager.
+        if (is_chipset_allowed_km4_strongbox() && is_strongbox_enabled() &&
+            is_attest_key_feature_disabled()) {
             GTEST_SKIP() << "Test is not applicable";
         }
     }
diff --git a/security/keymint/aidl/vts/functional/AuthTest.cpp b/security/keymint/aidl/vts/functional/AuthTest.cpp
index a31ac01..78c88f4 100644
--- a/security/keymint/aidl/vts/functional/AuthTest.cpp
+++ b/security/keymint/aidl/vts/functional/AuthTest.cpp
@@ -274,7 +274,7 @@
     std::shared_ptr<ISecureClock> clock_;
     string password_;
     uint32_t uid_;
-    long sid_;
+    int64_t sid_;
     std::vector<uint8_t> handle_;
 };
 
diff --git a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
index a6a9df6..3c753d1 100644
--- a/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
+++ b/security/keymint/aidl/vts/functional/KeyMintAidlTestBase.h
@@ -356,7 +356,7 @@
     SecurityLevel securityLevel_;
     string name_;
     string author_;
-    long challenge_;
+    int64_t challenge_;
 
   private:
     void CheckEncryptOneByteAtATime(BlockMode block_mode, const int block_size,
diff --git a/security/keymint/support/remote_prov_utils.cpp b/security/keymint/support/remote_prov_utils.cpp
index 9620b6a..491b757 100644
--- a/security/keymint/support/remote_prov_utils.cpp
+++ b/security/keymint/support/remote_prov_utils.cpp
@@ -805,8 +805,8 @@
         return "Challenge must be a Bstr.";
     }
 
-    if (challenge.size() < 32 || challenge.size() > 64) {
-        return "Challenge size must be between 32 and 64 bytes inclusive. "
+    if (challenge.size() < 16 || challenge.size() > 64) {
+        return "Challenge size must be between 16 and 64 bytes inclusive. "
                "However, challenge is " +
                std::to_string(challenge.size()) + " bytes long.";
     }
diff --git a/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl b/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl
index 5bd2145..35b83dd 100644
--- a/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl
+++ b/security/rkp/aidl/android/hardware/security/keymint/IRemotelyProvisionedComponent.aidl
@@ -315,7 +315,7 @@
      *
      * @param in challenge contains a byte string from the provisioning server which will be
      *        included in the signed data of the CSR structure. Different provisioned backends may
-     *        use different semantic data for this field, but the supported sizes must be between 32
+     *        use different semantic data for this field, but the supported sizes must be between 16
      *        and 64 bytes, inclusive.
      *
      * @return the following CBOR Certificate Signing Request (Csr) serialized into a byte array:
diff --git a/sensors/common/vts/utils/include/sensors-vts-utils/SensorsHidlTestBase.h b/sensors/common/vts/utils/include/sensors-vts-utils/SensorsHidlTestBase.h
index f2c92ae..ec7c906 100644
--- a/sensors/common/vts/utils/include/sensors-vts-utils/SensorsHidlTestBase.h
+++ b/sensors/common/vts/utils/include/sensors-vts-utils/SensorsHidlTestBase.h
@@ -225,7 +225,9 @@
 
         ASSERT_EQ(batch(handle, samplingPeriodInNs, batchingPeriodInNs), Result::OK);
         ASSERT_EQ(activate(handle, 1), Result::OK);
-        events = getEnvironment()->collectEvents(minTimeUs, minNEvent, true /*clearBeforeStart*/);
+        events = getEnvironment()->collectEvents(
+                minTimeUs, minNEvent, true /* clearBeforeStart */, true /* changeCollection */,
+                [&type](const EventType& event) { return event.sensorType == type; });
         ASSERT_EQ(activate(handle, 0), Result::OK);
 
         ALOGI("Collected %zu samples", events.size());
@@ -233,24 +235,14 @@
         ASSERT_GT(events.size(), 0u);
 
         bool handleMismatchReported = false;
-        bool metaSensorTypeErrorReported = false;
         for (auto& e : events) {
-            if (e.sensorType == type) {
-                // avoid generating hundreds of error
-                if (!handleMismatchReported) {
-                    EXPECT_EQ(e.sensorHandle, handle)
-                            << (handleMismatchReported = true,
-                                "Event of the same type must come from the sensor registered");
-                }
-                sensorEvents.push_back(e);
-            } else {
-                // avoid generating hundreds of error
-                if (!metaSensorTypeErrorReported) {
-                    EXPECT_TRUE(isMetaSensorType(e.sensorType))
-                            << (metaSensorTypeErrorReported = true,
-                                "Only meta types are allowed besides the type registered");
-                }
+            // avoid generating hundreds of error
+            if (!handleMismatchReported) {
+                EXPECT_EQ(e.sensorHandle, handle)
+                        << (handleMismatchReported = true,
+                            "Event of the same type must come from the sensor registered");
             }
+            sensorEvents.push_back(e);
         }
 
         std::string s;
diff --git a/sensors/common/vts/utils/include/sensors-vts-utils/SensorsVtsEnvironmentBase.h b/sensors/common/vts/utils/include/sensors-vts-utils/SensorsVtsEnvironmentBase.h
index e851d40..c061a75 100644
--- a/sensors/common/vts/utils/include/sensors-vts-utils/SensorsVtsEnvironmentBase.h
+++ b/sensors/common/vts/utils/include/sensors-vts-utils/SensorsVtsEnvironmentBase.h
@@ -20,6 +20,7 @@
 #include <gtest/gtest.h>
 
 #include <atomic>
+#include <functional>
 #include <memory>
 #include <mutex>
 #include <thread>
@@ -61,9 +62,16 @@
     }
 
     // set sensor event collection status
-    void setCollection(bool enable) {
+    void setCollection(bool enable, const std::optional<std::function<bool(const Event&)>>& filter =
+                                            std::nullopt) {
         std::lock_guard<std::mutex> lock(mEventsMutex);
         mCollectionEnabled = enable;
+
+        if (enable && filter.has_value()) {
+            mEventFilter = *filter;
+        } else {
+            mEventFilter.reset();
+        }
     }
 
     void registerCallback(IEventCallback<Event>* callback) {
@@ -76,8 +84,10 @@
         mCallback = nullptr;
     }
 
-    std::vector<Event> collectEvents(useconds_t timeLimitUs, size_t nEventLimit,
-                                     bool clearBeforeStart = true, bool changeCollection = true) {
+    std::vector<Event> collectEvents(
+            useconds_t timeLimitUs, size_t nEventLimit, bool clearBeforeStart = true,
+            bool changeCollection = true,
+            const std::optional<std::function<bool(const Event&)>>& filter = std::nullopt) {
         std::vector<Event> events;
         constexpr useconds_t SLEEP_GRANULARITY = 100 * 1000;  // granularity 100 ms
 
@@ -85,7 +95,7 @@
               clearBeforeStart);
 
         if (changeCollection) {
-            setCollection(true);
+            setCollection(true, filter);
         }
         if (clearBeforeStart) {
             catEvents(nullptr);
@@ -121,7 +131,7 @@
 
     void addEvent(const Event& ev) {
         std::lock_guard<std::mutex> lock(mEventsMutex);
-        if (mCollectionEnabled) {
+        if (mCollectionEnabled && (!mEventFilter.has_value() || (*mEventFilter)(ev))) {
             mEvents.push_back(ev);
         }
 
@@ -138,6 +148,7 @@
     std::atomic_bool mStopThread;
     std::thread mPollThread;
     std::vector<Event> mEvents;
+    std::optional<std::function<bool(const Event&)>> mEventFilter;
     std::mutex mEventsMutex;
 
     IEventCallback<Event>* mCallback;