vlc-debian-android: switch to NDK 27b and install in default location

It's more aware of page sizes [1].

Use the SHA1 provided by Google at [2].

It seems to be better to switch to this ASAP:

Regardless, it is recommended to move to Android NDK r27 or higher to update to the 16 KB ELF aligned version of the C++ standard library. Otherwise, your app will fail to install on 16 KB devices today.

[1] https://developer.android.com/guide/practices/page-sizes#ndk-build_1 [2] https://developer.android.com/ndk/downloads/