Update .gitignore file

.gitignore

+# Auth files
+*.jks
+app/rocket-chat.json
+app/src/release/google-services.json
+app/src/release/res/values/api_key_strings.xml
+
+################################# Created by https://www.gitignore.io/api/androidstudio (modified) #################################
+
+# Signing files
+.signing/
+
+# Android Studio
+/*/build/
+/*/local.properties
+/*/out
+/*/*/build
+/*/*/production
+*.ipr
+*~
+*.swp
+
+# NDK
+obj/
+
+# IntelliJ IDEA
+*.iws
+/out/
+
+# User-specific configurations
+.idea/libraries/
+.idea/.name
+.idea/compiler.xml
+.idea/copyright/profiles_settings.xml
+.idea/encodings.xml
+.idea/misc.xml
+.idea/modules.xml
+.idea/scopes/scope_settings.xml
+.idea/vcs.xml
+.idea/jsLibraryMappings.xml
+.idea/datasources.xml
+.idea/dataSources.ids
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# OS-specific files
+.DS_Store?
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Package Files #
+*.war
+*.ear
+
+# virtual machine crash logs (Reference: http://www.java.com/en/download/help/error_hotspot.xml)
+hs_err_pid*
+
+### AndroidStudio Patch ###
+!/gradle/wrapper/gradle-wrapper.jar
+
+# End of https://www.gitignore.io/api/androidstudio
+
+################################# Created by https://www.gitignore.io/api/android #################################
+
+### Android ###
 # Built application files
 *.apk
 *.ap_
 
-# Files for the Dalvik VM
+# Files for the ART/Dalvik VM
 *.dex
 
 # Java class files
@@ -11,15 +77,14 @@
 # Generated files
 bin/
 gen/
+out/
 
 # Gradle files
 .gradle/
 build/
-/*/build/
 
 # Local configuration file (sdk path, etc)
 local.properties
-fabric.properties
 
 # Proguard folder generated by Eclipse
 proguard/
@@ -27,15 +92,71 @@ proguard/
 # Log Files
 *.log
 
-# Android Studio Files
+# Android Studio Navigation editor temp files
+.navigation/
+
+# Android Studio captures folder
+captures/
+
+# Intellij
 *.iml
-.idea
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/gradle.xml
+.idea/dictionaries
+.idea/libraries
 
-# MacOS
-.DS_Store
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
 
-# Auth files
-*.jks
-app/rocket-chat.json
-app/src/release/google-services.json
-app/src/release/res/values/api_key_strings.xml
+# Freeline
+freeline.py
+freeline/
+freeline_project_description.json
+
+### Android Patch ###
+gen-external-apklibs
+
+# End of https://www.gitignore.io/api/android
+
+################################# Created by https://www.gitignore.io/api/crashlytics #################################
+
+### Crashlytics ###
+#Crashlytics
+crashlytics-build.properties
+com_crashlytics_export_strings.xml
+crashlytics.properties
+fabric.properties
+
+# End of https://www.gitignore.io/api/crashlytics
+
+################################# Created by https://www.gitignore.io/api/osx #################################
+
+### OSX ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# End of https://www.gitignore.io/api/osx
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