Upgrade grpc to 1.44.1

Author: wu-hui

build.gradle

@@ -45,8 +45,8 @@ apply from: "gradle/errorProne.gradle"
 ext {
     playServicesVersion = '16.0.1'
     supportAnnotationsVersion = '28.0.0'
-    googleTruthVersion = '0.45'
-    grpcVersion = '1.41.0'
+    googleTruthVersion = '1.1.3'
+    grpcVersion = '1.44.1'
     robolectricVersion = '4.3.1'
     protocVersion = '3.14.0'
     javaliteVersion = '3.14.0'