TI: Explicitly specify ::base

For our codebase, (based on aosp/android-14), the submitted change done in [1]
is not enough.

Add the missing ::base namespaces where needed so that we can build this HAL
version with Android 15.

[1] https://android.googlesource.com/platform/external/v4l2_codec2/+/0378da79c37e9d7c63224e91657fc5f2bb732666


Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>