Building APK always tries to use build-tools 28.0.3

[peper03]

In a clean environment with build-tools 29.0.2, building the APK always tries to pull in build-tools 28.0.3.
With the Docker container as currently checked in, this is very noticeable as the build fails due to insufficient permissions. In a "normal" environment, this would probably pass unnoticed unless someone was checking the logs the first time the build ran.

The dependency appears to be coming from qtbase/src/android/templates/build.gradle in qt-everywhere-src-5.14.1.

If always using 28.0.3 with different SDKs is OK, the Android readme should perhaps be updated (it currently recommends installing 29.0.2).
If the build-tools version needs to match the SDK used, possibly the version in build.gradle needs to be patched in makelibs.sh

[bennettpeter]

I have 28.0.3 as well as 29.0.2 installed. I am not sure how that came about. I have not had a problem building so I assume that building part of the library with 28.0.3 and part with 29.0.2 is OK. Perhaps for now we should recommend installing both.

Actually, I notice we are using QT 5.15.3 now so maybe it is not longer an issue.