Update example project (#2097)

Author: sean5940

android/src/main/AndroidManifest.xml

@@ -6,7 +6,8 @@
         </intent>
     </queries>
 
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="28" />
 
     <application>
 

example/.buckconfig

@@ -0,0 +1,2 @@
+BUNDLE_PATH: "vendor/bundle"
+BUNDLE_FORCE_RUBY_PLATFORM: 1

example/.bundle/config

@@ -0,0 +1,5 @@
+module.exports = {
+    root: true,
+    extends: '@react-native',
+  };
+  

example/.eslintrc.js

@@ -20,22 +20,47 @@ DerivedData
 *.hmap
 *.ipa
 *.xcuserstate
-project.xcworkspace
+ios/.xcode.env.local
 
-# Android/IJ
+# Android/IntelliJ
 #
-*.iml
+build/
 .idea
 .gradle
 local.properties
+*.iml
+*.hprof
+.cxx/
+*.keystore
+!debug.keystore
 
 # node.js
 #
 node_modules/
 npm-debug.log
+yarn-error.log
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
+# screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://docs.fastlane.tools/best-practices/source-control/
+
+**/fastlane/report.xml
+**/fastlane/Preview.html
+**/fastlane/screenshots
+**/fastlane/test_output
+
+# Bundle artifact
+*.jsbundle
+
+# Ruby / CocoaPods
+/ios/Pods/
+/vendor/bundle/
+
+# Temporary files created by Metro to check the health of the file watcher
+.metro-health-check*
 
-# BUCK
-buck-out/
-\.buckd/
-android/app/libs
-android/keystores/debug.keystore
+# testing
+/coverage

example/.flowconfig

@@ -0,0 +1,17 @@
+module.exports = {
+  arrowParens: 'always',
+  bracketSpacing: true,
+  embeddedLanguageFormatting: 'auto',
+  htmlWhitespaceSensitivity: 'css',
+  insertPragma: false,
+  bracketSameLine: true,
+  jsxSingleQuote: true,
+  printWidth: 120,
+  proseWrap: 'never',
+  quoteProps: 'as-needed',
+  semi: true,
+  singleQuote: true,
+  tabWidth: 4,
+  trailingComma: 'all',
+  useTabs: false,
+};