Update CMakeLists.txt to handle NEW Boost find_package

As the minimum boost version is 1.74 which is greater than 1.70 when Boost added
the cmake module, this policy should be used.

==

CMP0167
-------

.. versionadded:: 3.30

The ``FindBoost`` module is removed.

CMake 3.29 and below provide a ``FindBoost`` module, but it needs constant
updates to keep up with upstream Boost releases.  Upstream Boost 1.70
and above provide a ``BoostConfig.cmake`` package configuration file.
``find_package(Boost CONFIG)`` finds the upstream package directly,
without the find module.

CMake 3.30 and above prefer to not provide the ``FindBoost`` module
so that ``find_package(Boost)`` calls, without the ``CONFIG`` or
``NO_MODULE`` options, find the upstream ``BoostConfig.cmake`` directly.
This policy provides compatibility for projects that have not been ported
to use the upstream Boost package.

The ``OLD`` behavior of this policy is for ``find_package(Boost)`` to
load CMake's ``FindBoost`` module.  The ``NEW`` behavior is for
``find_package(Boost)`` to search for the upstream ``BoostConfig.cmake``.

This policy was introduced in CMake version 3.30.
It may be set by ``cmake_policy()`` or ``cmake_minimum_required()``.
If it is not set, CMake warns, and uses ``OLD`` behavior.

.. note::
  The ``OLD`` behavior of a policy is
  ``deprecated by definition``
  and may be removed in a future version of CMake.

CMakeLists.txt

@@ -314,6 +314,9 @@ if(NOT WIN32 AND NOT ANDROID)
 endif()
 
 if(NOT ANDROID)
+  if(POLICY CMP0167)
+    cmake_policy(SET CMP0167 NEW)
+  endif()
   find_package(Boost 1.74 REQUIRED)
 else()
   find_package(oboe REQUIRED CONFIG)