Simpl questions

Simpl answers

• How to use ccache to speed up compiling of aosp?
• What is the most elegant way of striping AOSP of its pre-installed packages?
• what is advantage of binderised hidl comparing to passthrough?
• Android.bp: how to add external header .h files
• How to find optimum combination for Cutting Stock Problem using Knapsack
• How to add relative path for srcs :[] in android.bp file
• unrecognized property "cflags" for cc_prebuilt_library_shared module