Revert "`data` dependency of java_test_host can be arch-specific"

This reverts commit cdd9b839.

Reason: this doesn't work. java_test_host is a multi target module.
Therefore, `arch.<arhc>.data` is not collapsed to `data` by the arch
mutator.

Bug: N/A
Test: N/A
Change-Id: I755b06718bacfe1513f6ad1e734e5a0d0ac57cd8