Revert "Fix Floating window bug"

This reverts commit f828c170a10854e15c2cb5a1dc357bb4ecd658a8.
Revert "ConnectivtyService : Execute connectivityCheck in thread pool"

This reverts commit 29c7f5b9f584bbcd9ab2894a819df38d2e86129b.
Revert "TouchExplorer: print error message instead of cause fatal exception"

This reverts commit a12b625a3da2080ad48ec807c9e2f9f9808c916f.
Revert "frameworks: Rquests permission for accessing downloaded files"

This reverts commit 5fae5ea016e89f11c624651c1f00a1adb96ac3e6.
Revert "ImagerReader: Return the buffer to queue if it fails to lock"

This reverts commit d0929c1e55c75d113ea017c2ab87419a3b17eaa8.
Revert "Add null pointer check for ExifParser"

This reverts commit 6b8c18df6371384bbda15737520d35f45ef9da08.
Revert "Fix keyboard layout notification missing issue"

This reverts commit 904ec5100ccc3df8f80b04b9817e5db1d307130f.
Revert "bless python versions newer than 2.6"

This reverts commit 5a3dbde09acd57dd0b06ebc976129741db5ac47e.
Revert "[ActivityManager] Ensure consistency behavior when a background activity brings another existed activity to front."

This reverts commit 540e8a9411c4bff359a391747389e975f82a1b3f.
Revert "frameworks/base: Fix build in ISO C++11 mode"

This reverts commit 86bb2ef8a6f25dee02c1049844d268e783085c1d.
Revert "Work around uint16_t vs. char16_t confusion"

This reverts commit 371e03007f8ba9203a36033db5a30b2a199b803c.
Revert "frameworks/base: Fix aliasing violations"

This reverts commit 04e6430d1f926f2b769d656780ce09fc7ccd6a62.
Revert "DocumentsUI: Fix the issue of download status was displayed incompletely"

This reverts commit 3c7981ab67d38cc6235b97de839f24c0378cdc8b.
Revert "WallpaperCropper: Fix crash when set .gif as wallpaper"

This reverts commit 44ad49cf75bb1d4cd7db16f96abe2c937404503e.
ConnectivtyService : Execute connectivityCheck in thread pool

Since this async task takes long when doing things like waiting for
network connectivity...etc, rather than holding up the single executor
of async task for the framework (app_process), run it on a thread from
the pool so other tasks can execute in parallel.

Change-Id: I7b88a4837c7e117ef47014a20c57f828b811edfb