diff --git a/cmds/incidentd/src/PrivacyBuffer.cpp b/cmds/incidentd/src/PrivacyBuffer.cpp
index 6cd2fe15c1d89..d753e5e6404e0 100644
--- a/cmds/incidentd/src/PrivacyBuffer.cpp
+++ b/cmds/incidentd/src/PrivacyBuffer.cpp
@@ -34,7 +34,7 @@ namespace incidentd {
 void PrivacyBuffer::writeFieldOrSkip(uint32_t fieldTag, bool skip) {
     uint8_t wireType = read_wire_type(fieldTag);
     size_t bytesToWrite = 0;
-    uint32_t varint = 0;
+    uint64_t varint = 0;
 
     switch (wireType) {
         case WIRE_TYPE_VARINT:
diff --git a/cmds/incidentd/src/Section.h b/cmds/incidentd/src/Section.h
index 34a3613cf0d06..20ecdb1cdfbd8 100644
--- a/cmds/incidentd/src/Section.h
+++ b/cmds/incidentd/src/Section.h
@@ -31,7 +31,7 @@ namespace android {
 namespace os {
 namespace incidentd {
 
-const int64_t REMOTE_CALL_TIMEOUT_MS = 10 * 1000;  // 10 seconds
+const int64_t REMOTE_CALL_TIMEOUT_MS = 30 * 1000;  // 30 seconds
 
 /**
  * Base class for sections
diff --git a/core/proto/android/os/incident.proto b/core/proto/android/os/incident.proto
index 6467976bbf592..2a7c256031fe5 100644
--- a/core/proto/android/os/incident.proto
+++ b/core/proto/android/os/incident.proto
@@ -170,7 +170,7 @@ message IncidentProto {
     ];
 
     optional BatteryTypeProto battery_type = 2006 [
-        (section).type = SECTION_FILE,
+        (section).type = SECTION_NONE, // disabled since the path is device specific!
         (section).args = "/sys/class/power_supply/bms/battery_type"
     ];
 
diff --git a/core/proto/android/service/notification.proto b/core/proto/android/service/notification.proto
index cccd2fe568003..bcd7f29a2fcf3 100644
--- a/core/proto/android/service/notification.proto
+++ b/core/proto/android/service/notification.proto
@@ -65,7 +65,7 @@ message NotificationRecordProto {
     optional bool can_vibrate = 7;
     optional bool can_show_light = 8;
     optional string group_key = 9 [ (.android.privacy).dest = DEST_EXPLICIT ];
-    optional int32 importance = 10;
+    optional sint32 importance = 10;
 }
 
 message ListenersDisablingEffectsProto {
@@ -122,11 +122,11 @@ message RankingHelperProto {
         // Default value is UNKNOWN_UID = USER_NULL = -10000.
         optional int32 uid = 2;
         // Default is IMPORTANCE_UNSPECIFIED (-1000).
-        optional int32 importance = 3;
+        optional sint32 importance = 3;
         // Default is PRIORITY_DEFAULT (0).
         optional int32 priority = 4;
         // Default is VISIBILITY_NO_OVERRIDE (-1000).
-        optional int32 visibility = 5;
+        optional sint32 visibility = 5;
         // Default is true.
         optional bool show_badge = 6;
         repeated android.app.NotificationChannelProto channels = 7;
diff --git a/libs/protoutil/Android.bp b/libs/protoutil/Android.bp
index 4f1d2d5a4fe5e..7ad83ca796953 100644
--- a/libs/protoutil/Android.bp
+++ b/libs/protoutil/Android.bp
@@ -37,3 +37,20 @@ cc_library {
         "liblog",
     ],
 }
+
+cc_test {
+    name: "libprotoutil_test",
+
+    srcs: [
+        "tests/EncodedBuffer_test.cpp",
+    ],
+
+    shared_libs: [
+        "libcutils",
+        "libprotoutil",
+    ],
+
+    static_libs: [
+        "libgmock",
+    ],
+}
diff --git a/libs/protoutil/AndroidTest.xml b/libs/protoutil/AndroidTest.xml
new file mode 100644
index 0000000000000..46d418e1bb0a9
--- /dev/null
+++ b/libs/protoutil/AndroidTest.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2018 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for libprotoutil_test">
+    <target_preparer class="com.android.tradefed.targetprep.PushFilePreparer">
+        <option name="cleanup" value="true" />
+        <option name="push" value="libprotoutil_test->/data/nativetest/libprotoutil_test" />
+    </target_preparer>
+    <option name="test-suite-tag" value="apct" />
+    <test class="com.android.tradefed.testtype.GTest" >
+        <option name="native-test-device-path" value="/data/nativetest" />
+        <option name="module-name" value="libprotoutil_test" />
+    </test>
+</configuration>
diff --git a/libs/protoutil/src/EncodedBuffer.cpp b/libs/protoutil/src/EncodedBuffer.cpp
index 3a5e2e9ef5d0c..c017851a16233 100644
--- a/libs/protoutil/src/EncodedBuffer.cpp
+++ b/libs/protoutil/src/EncodedBuffer.cpp
@@ -13,11 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#define LOG_TAG "libprotoutil"
+
+#include <stdlib.h>
 
 #include <android/util/EncodedBuffer.h>
 #include <android/util/protobuf.h>
-
-#include <stdlib.h>
+#include <cutils/log.h>
 
 namespace android {
 namespace util {
@@ -228,7 +230,7 @@ EncodedBuffer::readRawVarint()
     size_t start = mEp.pos();
     while (true) {
         uint8_t byte = readRawByte();
-        val += (byte & 0x7F) << shift;
+        val |= (UINT64_C(0x7F) & byte) << shift;
         if ((byte & 0x80) == 0) break;
         shift += 7;
     }
@@ -345,7 +347,7 @@ EncodedBuffer::iterator::readRawVarint()
     uint64_t val = 0, shift = 0;
     while (true) {
         uint8_t byte = next();
-        val += (byte & 0x7F) << shift;
+        val |= (INT64_C(0x7F) & byte) << shift;
         if ((byte & 0x80) == 0) break;
         shift += 7;
     }
diff --git a/libs/protoutil/tests/EncodedBuffer_test.cpp b/libs/protoutil/tests/EncodedBuffer_test.cpp
new file mode 100644
index 0000000000000..615ab4ab29ed7
--- /dev/null
+++ b/libs/protoutil/tests/EncodedBuffer_test.cpp
@@ -0,0 +1,25 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include <android/util/EncodedBuffer.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+using namespace android::util;
+
+TEST(EncodedBufferTest, ReadVarint) {
+    EncodedBuffer buffer;
+    uint64_t val = UINT64_C(1522865904593);
+    buffer.writeRawVarint64(val);
+    EXPECT_EQ(val, buffer.begin().readRawVarint());
+}