build,android: fix building with updated tools

Author: jaimecbernardo

tools/mobile-test/android/testnode/app/build.gradle

@@ -32,7 +32,6 @@ android {
     }
     sourceSets {
         main {
-            jniLibs.srcDirs '../../../../../out_android/'
             assets.srcDirs += '../../../../../test/'
         }
     }

tools/mobile-test/android/testnode/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
+        classpath 'com.android.tools.build:gradle:4.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

tools/mobile-test/android/testnode/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip