wifi: show devices behind a firewall that are connected to the  WiFi hotspot

* Clients that are behind a firewall, in particular Windows-PCs tend
to not respond to the request invoked by the isReached(val)-method.
Executing a ping instead and evaluating the outcome enables us to
bypass the firewall.

Change-Id: If857545c7a4d5fbc9d2dc919096a9c84e64d6877
(cherry picked from commit 80f701909ebe9e5b71f91f8784a777aa5428444f)
Hide power menu from secure lockscreen (1/2)

- Use the same logic in our NavRing targets since crDroid allow power menu option through it

Special thanks to @cmorlok in this commit: https://github.com/omnirom/android_frameworks_base/commit/8f955b51a5f53d6b67cb1ec4fc34f07042766e0a and @Mahdi-Rom in this commit: https://github.com/Mahdi-Rom/android_frameworks_base/commit/c50cd9e53abbf571d090842fdb5b955e2c40a640

Change-Id: I9966f8282b4761a3ab154f63c8582a83a31dc5da

Conflicts:
	core/java/android/provider/Settings.java

(cherry picked from commit 71251cb7b38c33b2fb6722e8cca90c05bd45a190)
Force Expanded Notifications (1/2)
This will force expanded notifications for all apps that support
expanded notifications

Change-Id: I4b24026343ca92368fcdba713fb884cc220afaf0
(cherry picked from commit c50b68b9dae7c834fb02001b0691a5f9984ea2a1)
DocumentsUI: fix white action context bar in TRDS tablet view

Change-Id: I3c580a2aa4f8abbcfd06ad974518343f6e9190c5
(cherry picked from commit f25dec9dc5fb3b8336e48bfccc7c39d3a0212e84)
DocumentsUI: Update launcher icon.. credit and thanks for the icon goes to Dave Kover (kovdev)

please check out his icon packs  https://play.google.com/store/search?q=kovdev

(cherry picked from commit e719819cedadf554e0d46e09339cd524425bc03f)
DocumentsUI: add xxxhdpi icon

Credit Dave Kover (kovdev)

(cherry picked from commit e9403f5f26ea81ec9e56078550005a8620275fff)
Fix QS battery icon tile

(cherry picked from commit b0a4a21c2ee3562923dc117ef15384cd4631345e)