Add standard NDK / CMake default compile and linker flags to ClangPlatformBuilder

To match standard NDK/CMake builds across AndroidX native modules that migrate to the ClangBuildService.

Bug: 342671895
Bug: 544826464
Bug: 547643929
Test: ./gradlew :buildSrc-tests:test
Change-Id: Id6aead98682df6a12e24830e35052d0a456d7dfb