OboeTester: upgrade gradle to 6.1.1
diff --git a/apps/OboeTester/build.gradle b/apps/OboeTester/build.gradle
index d254264..ef0c71a 100644
--- a/apps/OboeTester/build.gradle
+++ b/apps/OboeTester/build.gradle
@@ -6,7 +6,7 @@
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.2'
+        classpath 'com.android.tools.build:gradle:4.0.0'
     }
 }
 
diff --git a/apps/OboeTester/gradle/wrapper/gradle-wrapper.properties b/apps/OboeTester/gradle/wrapper/gradle-wrapper.properties
index 419af02..1ef4ec2 100644
--- a/apps/OboeTester/gradle/wrapper/gradle-wrapper.properties
+++ b/apps/OboeTester/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed Mar 25 15:16:43 PDT 2020
+#Mon Aug 03 13:45:58 PDT 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip