No device test

* Older cargo2android.py missed the device test module
  because the 2nd call to cargo --tests was optimized out.
  But the device tests cannot be enabled before all
  dependent libraries are also built for device.

Bug: 169872957
Test: mm in external/rust/crates
Test: atest -c --include-subdirs external/rust/crates
Change-Id: I011a9bcdf12ce80d8b3fb732282fb82691e5da7a
1 file changed