Status bar: Add HSPA+ icons

Forward port H+ icon in the status bar when connected to HSPA+
Uses new vector drawables by @blunden

PS1: Initial commit
PS2: New vectors (thanks @blunden)
PS3: Cleanup
PS4: Use correct indentation (oops)
PS5: Show correct icon in status bar (thanks @mikeNG)
PS6: Remove leftover Holo icons (thanks @mikeNG)
PS7: Rebase to depend on Holo icon removal (thanks @mikeNG)
PS8: Update commit message

Change-Id: Ia745c524d5e2530f50f12f961ea8533a4c8f5842
Revert "SystemUI: Add data type and signal icons"

* These aren't used anywhere and are still Holo

This reverts commit 4e5e6d4cd8e56755d3e4cdaf08ede0e7ee3c82dc.

Change-Id: I39c6060766b2f75dd1362d945be31f6f9d20f59d