tutorials/android: Update for NDK r18 changes

libc++_shared needs to be enabled in the application in order for it to
be included and used correctly for c++ plugins.

Only symbols from libraries explicitly mentioned are exported from
libgstreamer_android.so so we need to add a couple of deps to be able to
access the necessary functions.

1 job for android in 2 minutes and 31 seconds (queued for 1 second)