Removing Non-HIDL Widevine DRM Plugin for Android

[ Merge of http://go/wvgerrit/138089 ]

Non-hidl code is no longer needed in the widevine android plugin. By
doing work this cleanup will save the team from having to keep
maintaining code that isn't needed anymore.
Clean up steps taken as follows:
    1. Remove non-hidl code but keep commonly used code
    2. Remove legacy test code
    3. Remove legacy test build and test entry

Bug: 69573078
Bug: 172285246
Test: unit tests, GtsMediaTestCases, CtsMediaDrmTestCases
Change-Id: I75938d69413c631ef6be82da3d885ba173efc581

libwvdrmengine/run_all_unit_tests.sh

@@ -112,9 +112,7 @@ adb_shell_run hidl_metrics_adapter_unittest
 adb_shell_run http_socket_test
 adb_shell_run initialization_data_unittest
 adb_shell_run libwvdrmdrmplugin_hidl_test
-adb_shell_run libwvdrmdrmplugin_test
 adb_shell_run libwvdrmmediacrypto_hidl_test
-adb_shell_run libwvdrmmediacrypto_test
 adb_shell_run license_keys_unittest
 adb_shell_run license_unittest
 adb_shell_run odk_test
@@ -130,13 +128,6 @@ adb_shell_run usage_table_header_unittest
 adb_shell_run value_metric_unittest
 adb_shell_run wv_cdm_metrics_test
 
-# Run the non-Treble test on non-Treble devices
-if adb $SERIAL_NUM shell ls /vendor/lib/mediadrm/libwvdrmengine.so &> /dev/null ||
-    adb $SERIAL_NUM shell ls /vendor/lib64/mediadrm/libwvdrmengine.so &> /dev/null; then
-  library_path="/vendor/lib/mediadrm/:/vendor/lib64/mediadrm/"
-  adb_shell_run libwvdrmengine_test LD_LIBRARY_PATH=$library_path
-fi
-
 # Run the Treble test on Treble devices
 if adb $SERIAL_NUM shell ls /vendor/lib/libwvhidl.so &> /dev/null ||
     adb $SERIAL_NUM shell ls /vendor/lib64/libwvhidl.so &> /dev/null; then