Revert "Make navbar height+width bounds relative to their dimens in com.android.internal"

the max size navbar takes up 25% of the screen
the smallest value makes the navbar not possible to touch
the stock value is ~10% on the seekbar where it should probably be 50-75% for a more useable value range
the seekbar progress restores in both onResume and if the settings.apk is killed to almost the max value
the derp in hdpi device sizing was fixed in the following patchset

This reverts commit 3f9467a5fd7382dbe30e636fb908b2a4f1cb1b7c.

Change-Id: I8fb30d61a80c8f9a0afdb62c058e97073af6d10a