Revert "FlingTracker can divide by zero and hang StatusBar in an infinite loop"

This reverts commit c91d999f27a4fd02ca837aa36582113588f32e73.
Revert "Fall back to software rendering of the wallpaper in case OpenGL rendering fails"

This reverts commit ea05a3c785336a1e95570e3823a627583d32afbc.
Revert "hardware rendering for statusbarmanager and pie"

This reverts commit 3fdc4332320b85bbe076f8fd26d4dcfe43d3852b.