Add IntDef annotations to fields

Added IntDef annotations to fields that missed them in
WindowManager LayoutParams: input_feature_flags,
system_ui_visibility_flags and subtree_system_ui_visibility_flags.

Bug: 160129453
Test: Run 'mp :framework-minus-apex-intdefs' and check if mapping files are properly generated

Change-Id: I66d6dcbff3b41175827c84c9fda68be92877925a