tests: Pick up testdata with LOCAL_TEST_DATA.

Also push the testdata in AndroidTest.xml for `atest`.

LOCAL_TEST_DATA was added in commit [1], which ships testdata next to
native tests.

With this CL,
 1) manually sync-ing via `adb sync` and running tests with `adb shell`
    keep working.
 2) both of 32- and 64-bit recovery_{unit,component}_test now work in
    APCT continuous tests. Note that 64-bit tests were failing
    previously in APCT, due to missing testdata.
 3) `atest recovery_unit_test` works, as the testdata gets pushed to
    /data/local/tmp.

[1] commit d07ba4e2a625a8f000d042c1953adb612bccbbe2 in
https://android-review.googlesource.com/c/platform/build/+/312567.

Bug: 77320514
Test: Build recovery_{unit,component,manual}_test. Setup the test via
      `adb sync data`. Run both of 32- and 64-bit versions on device.
Test: Build and run recovery_host_test on host, for both of 32- and
      64-bit versions.
Test: `atest recovery_component_test`
Change-Id: Ie54037726043a3a659a80030b83db1f8c1de318d