build: submodules for libpasada, librubberband. Add librubberband.

app/src/main/cpp/CMakeLists.txt

@@ -13,6 +13,7 @@ cmake_minimum_required(VERSION 3.22.1)
 project("lockstep-native")
 
 add_subdirectory(libpasada/pasada-lib)
+add_subdirectory(librubberband)
 
 # Creates and names a library, sets it as either STATIC
 # or SHARED, and provides the relative paths to its source code.
@@ -57,6 +58,7 @@ target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE libpasada/pasada-lib/in
 target_link_libraries(${CMAKE_PROJECT_NAME}
     # List libraries link to the target library
     pasada
+    rubberband
     oboe::oboe
     mpg123
     android