Allowing Launcher to draw behind cutouts

> Launcher uses realSize, availableSize and insets to calculate
various layout values. Without drawing behind cutouts, these values
are not consistent (insets + availableSize != realSize) leading to
jumps in layouts.
> Removing fake black bars in low-ram devices to avoid inconsistent
insets.
> Fixing various layouts not taking lert/right insets into account.

Bug: 156268804
Change-Id: I8441db8a468b08a65b57b932050b5b4b37313966

src/com/android/launcher3/DeviceProfile.java

@@ -538,7 +538,6 @@ public class DeviceProfile {
                         mInsets.right + hotseatBarSidePaddingStartPx, mInsets.bottom);
             }
         } else {
-
             // We want the edges of the hotseat to line up with the edges of the workspace, but the
             // icons in the hotseat are a different size, and so don't line up perfectly. To account
             // for this, we pad the left and right of the hotseat with half of the difference of a
@@ -547,9 +546,11 @@ public class DeviceProfile {
             float hotseatCellWidth = (float) widthPx / inv.numHotseatIcons;
             int hotseatAdjustment = Math.round((workspaceCellWidth - hotseatCellWidth) / 2);
             mHotseatPadding.set(
-                    hotseatAdjustment + workspacePadding.left + cellLayoutPaddingLeftRightPx,
+                    hotseatAdjustment + workspacePadding.left + cellLayoutPaddingLeftRightPx
+                            + mInsets.left,
                     hotseatBarTopPaddingPx,
-                    hotseatAdjustment + workspacePadding.right + cellLayoutPaddingLeftRightPx,
+                    hotseatAdjustment + workspacePadding.right + cellLayoutPaddingLeftRightPx
+                            + mInsets.right,
                     hotseatBarBottomPaddingPx + mInsets.bottom + cellLayoutBottomPaddingPx);
         }
         return mHotseatPadding;