Upgrade NDK to the version 9d

[lamerman]

We can do upgrade of NDK up to the 9d with minimal changes. It brings users more modern
available platforms from android-9 up to android-19. Before they could choose
only android-14 as maximum platform.

The update of the default target version is proposed from android-14 to android-16
as the latest creates "position independent executables (PIE)" by default. It's not possible
to run not PIE on platforms >= android-16. It seems to be more logical to switch default
to support modern android android-16 to android-25 than supporting the previous versions.

It's still possible for user to compile to older versions, down to android-9. He just has
to manually switch the target version.

[lamerman]

If you accept this solution, then before merging it to master the docker image needs to be regenerated as it was changed.
Today I tested this change and it produced binaries rosbag/record that I could actually run on my android phone with android 6.0.

[adamantivm]

Sorry for such a naïve question but is there any reason we may not as well move straight to the highest supported version, r13b? Would that break other things?

[lamerman]

@adamantivm , no it will not break anything I think and it's probably even better. I tried to do it yesterday. The problem starts with boost, that you need to change it in order to compile for > 9d.
So 9d is the last version when it still works with zero efforts and brings you much later in terms of the android version.
It's better to do 10, 13, but it will require effort at least for boost, as current boost does not compile with higher versions. There is one fork of the boost you use that claims to compile with NDK 10 though. Maybe then it will require work for something else.
I would frankly do what we can do now with zero effort and then think about more heavyweight updates.

[lamerman]

Maybe I misunderstood your question "Would that break other things?". I answered in terms of user experience, and probably you asked about compilation of ndk. For compilation, yes it will break at least boost.

[ernestmc]

Yes, the problem with the newer versions of the NDK is that they've switched to Clang as the default compiler and some things may need fixing before compiling.
Thanks for your PR @lamerman. I'll review it as soon as I can.