Check in .idea files and reformat Lottie Java code (#1764)

The Java code style was never checked into the repo which has led to some inconsistent formatting. It is now checked in and I ran the formatter on the core lottie module.

.gitignore

@@ -1,8 +1,33 @@
 *.iml
 .gradle
 /local.properties
-/.idea/*
-!.idea/codeStyleSettings.xml
+
+
+# From https://github.com/github/gitignore/blob/master/Global/JetBrains.gitignore
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+
 .DS_Store
 /build
 /captures