Add ifdefs for QCOM-specific features

Change-Id: I6e140e0dab9f2ce929c356f9c486309bb7e23099
SystemUI: Fix HSPA+ and LTE icons in statusbar

Change-Id: I7180bcf0ac206ecac27e1d37174697a9de19bdf1
Factor out preference-in-storage check to overridable method.

Change-Id: I2fff3192802f8a180330fda66388eda394334a5a
systemui: Kill logspam

Change-Id: Id1c7c9c56632714aa6a161189d3d8e67a8a030ba