Move .gitignore -> .hgignore, update ignore list, #noticket

.gitignore

@@ -1,16 +0,0 @@
-.DS_Store
-.atom/
-.idea
-.packages
-.pub/
-.gradle/
-build/
-gen/
-ios/.generated/
-packages
-pubspec.lock
-.flutter-plugins
-android/app/gradle
-android/app/gradlew
-android/app/gradlew.bat
-android/app/local.properties

.hgignore

@@ -0,0 +1,24 @@
+.DS_Store
+.atom/
+.idea
+.packages
+.pub/
+.gradle/
+build/
+gen/
+ios/.generated/
+packages
+pubspec.lock
+.flutter-plugins
+android/gradle
+android/gradlew
+android/gradlew.bat
+android/local.properties
+android/app/gradle
+android/app/gradlew
+android/app/gradlew.bat
+android/app/local.properties
+
+android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+ios/Runner/GeneratedPluginRegistrant.h
+ios/Runner/GeneratedPluginRegistrant.m