Revert "Navigation Bar Transparency Mode (1/2)"

This reverts commit fc696acc00099c0da399e36b6b26ae40efa5f1c6.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/NavigationBarView.java

Change-Id: I1b7c4901c67e137f62604834d046c294065a5723
Revert "Seperate Statusbar Transparency Settings (1/2)"

This reverts commit 3ee40b8c2817cdf3e91d0a84c916dd5d7f76ff79.
SystemUI: transparency control overhaul

Allow more customization. TransparencyManager's responsibility
is to apply the values it is being fed from Settings.System set by
ROMControl.

Tablets do not use transparency currently, but it shouldn't throw
any errors.

Change-Id: I11c1578938e337285d99e9fa1fbbd537a4ee43ec
Signed-off-by: Roman Birg <romanbirg@gmail.com>

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/NavigationBarView.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java