Address missing dependencies or executables

[ Merge of http://go/wvgerrit/195850 ]

Since Widevine device builds now include APEX prebuilts,
shared library dependencies for the prebuilts are in
are in /apex/com.google.android.widevine/lib[64] rather
than /system/lib[64] or /vendor/lib[64]. When tests are
run not all the dependencies are present.

These changes include
* Statically linking missing dependencies
* Adding /apex/com.google.android.widevine/lib[64] to
  the shared library path
* Searching for some of the test executables in
  /data/nativetest[64]/vendor/

Bug: 329888778
Bug: 329891889
Bug: 329891175
Bug: 329891049

Test: ./build_and_run_all_unit_tests.sh
Change-Id: I067685cedc7701c4e6502bdac98b53e22b61ad1e

libwvdrmengine/oemcrypto/test/common.mk

@@ -49,6 +49,7 @@ LOCAL_C_INCLUDES += \
 
 LOCAL_STATIC_LIBRARIES := \
   libcdm \
+  libcppbor \
   libjsmn \
   libgmock \
   libgtest \
@@ -62,7 +63,6 @@ LOCAL_STATIC_LIBRARIES := \
 
 LOCAL_SHARED_LIBRARIES := \
   libbase \
-  libcppbor \
   libcrypto \
   libdl \
   libbinder_ndk \