Reset squishiness fraction of reused tile views when added to new layout

Otherwise the tile view's squishiness might differ from the layout squishiness fraction, leading to a bug where a tile's height would sometimes not be updated on configuration changes.

Bug: 310377121
Flag: none
Test: TileLayoutTest
Change-Id: Idfe83541e21ea069036104b8bd7cc42f8d7d5dc4