Copy shared libraries used by tests to testcases directory

This change collects the shared libraries files used by tests in
suite, and deploy the files to testcases/lib*. The shared libraries then
can be zipped in general-tests.zip and device-tests.zip. And the host
test can be run in TradeFed host based on build artifacts.

Bug: 111486845
Test: m -j general-tests; m -j device-tests
Confirm the test can run in testcases directory:
out/host/linux-x86/testcases$ ./net_test_avrcp/x86_64/net_test_avrcp
unzip general-tests.zip, confirm net_test_avrcp can run.

Change-Id: I4f9322118aa4891226ea318cbd1bcee6ca48b050