Include the hashtree in Q-launched modules.

For post-Q modules, we can avoid building the hashtree also in the
unbundled build case, since the device will regenerate the hashtree
locally. This CL simplifies the logic so that the build rules apply
regardless of the build being bundled or unbundled -- after all, bundled
build are only really valid for development purposes.

Fix: 147600151
Test: unit test;
m com.android.conscrypt and manual inspection of apexer invocation
(option no_hashtree not present)
m com.android.neuralnetworks and manual inspection of apexer invocation
(option no_hashtree present)

Change-Id: Ib4cc6149d3beac5df7e23a65a3b7ee6b0d68e395