FDPT: Full Decrypt Path Testing Application

Cherry pick of http://go/ag/9326830

This is a merge of the full decrypt path testing CLs from the Widevine
repo: http://go/wvgerrit/q/topic:FDPT-subsamples

This is the Full Decrypt Path Testing application that can be used by
device makers to verify that OEMCrypto is correctly decrypting content
to secure buffers.

Testing: Ran App.
Bug: 113594822

Change-Id: Icbb1e2f2e762bac3cc1b7b20749922c14ea24449

libwvdrmengine/test/java/FullDecryptPathTesting/mobile/CMakeLists.txt

@@ -0,0 +1,46 @@
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html
+
+# Sets the minimum version of CMake required to build the native library.
+
+cmake_minimum_required(VERSION 3.4.1)
+
+# Creates and names a library, sets it as either STATIC
+# or SHARED, and provides the relative paths to its source code.
+# You can define multiple libraries, and CMake builds them for you.
+# Gradle automatically packages shared libraries with your APK.
+
+add_library( # Sets the name of the library.
+             native-lib
+
+             # Sets the library as a shared library.
+             SHARED
+
+             # Provides a relative path to your source file(s).
+             src/main/cpp/native-lib.cpp
+             src/main/cpp/wvcrc.cpp
+             )
+
+# Searches for a specified prebuilt library and stores the path as a
+# variable. Because CMake includes system libraries in the search path by
+# default, you only need to specify the name of the public NDK library
+# you want to add. CMake verifies that the library exists before
+# completing its build.
+
+find_library( # Sets the name of the path variable.
+              log-lib
+
+              # Specifies the name of the NDK library that
+              # you want CMake to locate.
+              log )
+
+# Specifies libraries CMake should link to your target library. You
+# can link multiple libraries, such as libraries you define in this
+# build script, prebuilt third-party libraries, or system libraries.
+
+target_link_libraries( # Specifies the target library.
+                       native-lib
+
+                       # Links the target library to the log library
+                       # included in the NDK.
+                       ${log-lib} )