All: Added methods to get secure random bytes

ReactNativeClient/android/app/build.gradle

@@ -137,6 +137,7 @@ android {
 }
 
 dependencies {
+    compile project(':react-native-securerandom')
     compile project(':react-native-push-notification')
     compile project(':react-native-fs')
     compile project(':react-native-image-picker')

ReactNativeClient/android/app/src/main/java/net/cozic/joplin/MainApplication.java

@@ -3,6 +3,7 @@ package net.cozic.joplin;
 import android.app.Application;
 
 import com.facebook.react.ReactApplication;
+import net.rhogan.rnsecurerandom.RNSecureRandomPackage;
 import com.dieam.reactnativepushnotification.ReactNativePushNotificationPackage;
 import com.imagepicker.ImagePickerPackage;
 import com.facebook.react.ReactNativeHost;
@@ -32,6 +33,7 @@ public class MainApplication extends Application implements ReactApplication {
 			return Arrays.<ReactPackage>asList(
 				new ImageResizerPackage(),
 				new MainReactPackage(),
+            new RNSecureRandomPackage(),
             new ReactNativePushNotificationPackage(),
 				new ImagePickerPackage(),
 				new ReactNativeDocumentPicker(),

ReactNativeClient/android/settings.gradle

@@ -1,4 +1,6 @@
 rootProject.name = 'Joplin'
+include ':react-native-securerandom'
+project(':react-native-securerandom').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-securerandom/android')
 include ':react-native-push-notification'
 project(':react-native-push-notification').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-push-notification/android')
 include ':react-native-fs'