Add proguard sample
Add image for dumping heap and inspect leaks
Add image for preference sample
Add image for preference category
Add image for preference subscreen
Add DI Sample
Fix jar reference
Add image for preference intent
Add report file for 3.1
Add debug practice
Add app structure top level views image
Add category views image
add test application of android
submit report for 1.04
solve to FrameLayout-Practice1
solve FrameLayoutPractice2
solve ScrollViewPractice1
solve LayoutAssignment1
solve LayoutAssignment2_1
solve LayoutAssignment2_2