deps: update guava to 28.1-android

Author: chingor13

pom.xml

@@ -69,9 +69,10 @@
  <grpc.version>1.24.0</grpc.version>
  <protobuf.version>3.10.0</protobuf.version>
  <junit.version>4.12</junit.version>
- <guava.version>28.0-android</guava.version>
+ <guava.version>28.1-android</guava.version>
  <threeten.version>1.4.0</threeten.version>
  <javax.annotations.version>1.3.2</javax.annotations.version>
+ <animal-sniffer.version>1.18</animal-sniffer.version>
  </properties>
 
  <dependencyManagement>
@@ -139,6 +140,11 @@
  <artifactId>javax.annotation-api</artifactId>
  <version>${javax.annotations.version}</version>
  </dependency>
+ <dependency>
+ <groupId>org.codehaus.mojo</groupId>
+ <artifactId>animal-sniffer-annotations</artifactId>
+ <version>${animal-sniffer.version}</version>
+ </dependency>
 
  <dependency>
  <groupId>junit</groupId>