Increased minimum SDK to Android 5 because of errors compiling for Android 4. Fixed web interface javascript (broken by V3.1.13). Separated Start-up and Main activity UI strings to resources so we can add translations

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.1'
+        classpath 'com.android.tools.build:gradle:3.6.0'
     }
 }
 allprojects {
@@ -27,3 +27,9 @@ allprojects {
 dependencies {
 }
 
+if (hasProperty('buildScan')) {
+    buildScan {
+        termsOfServiceUrl = 'https://gradle.com/terms-of-service'
+        termsOfServiceAgree = 'yes'
+    }
+}