When exiting the LunarLander sample, it was possible for the canvas
to get destroyed before execution was halted.
Added additional synchronization to make sure the current run-state
is accounted for before performing a canvas update.
Also updated deprecated constants in lunar_layout.xml.
Bug: 6164549
Change-Id: I9a710f6b128491f1beece84dd39ab00f4937a4c6
b69d09ecd9