Add .gitignore to lib-screensharing

Author: zshbleaker

Android/APIExample/lib-screensharing/.gitignore

@@ -0,0 +1,18 @@
+*.so
+*.iml
+.gradle
+/local.properties
+/.idea
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+androidTest/
+Test/