Revert "Fix pie controls being disabled by launcher gestures."

This reverts commit 8c15b6896211d569c16d3bcaa0138d478b1ae89d.
Revert "Add pie control optimizations for Phone UI."

This reverts commit 0d23cdbaadcb721bef21be98bfe539593c494812.
Revert "Pie controls."

This reverts commit 7750afbcc9fc353f548ce3eaaf95c56500d506e2.
Revert "Added support for multiple navigation key bars"

This reverts commit 37ac028b3bb3b2ddd239e8ea5be8cb25ed7173a7.
Fix layout of MultiWaveView and GlowPadView.

If the calculated size of the rings is much smaller than the measured
size (which is happening e.g. on mdpi 600x1024 tablets), the glow pad
appeared shifted to the right.
This happened due to the insets being calculated as difference of
available and needed size, and later on being added to the available
size. Example numbers (Nexus 4 with density forced to 160):
- computed size in onMeasure: 768x505
- scaled size in onMeasure: 505x505
- thus, insets are calculated as 131/0
- in onLayout, placementWidth (364) and max target width (108) are much
  smaller than width (768)
- thus, center is calculated as 131 + (768 / 2) = 515, thus shifted to
  the right

Fix that by not using width in the calculation, as the inset size
already takes it into consideration.