Fix the build for android gradle plugin 9.0.1

[Ant1r]

this fixes pd-core build with a temporary fix:

android.newDsl=false

and also fixes PdTest build error about Proguard, which now requires to replace proguard-android.txt with proguard-android-optimize.txt.

[joebowbeer]

Thanks for finding a workaround. Let this PR sit for a while while we look for "permanent" fix?

[Ant1r]

I don't know... I saw in some blogs that for now there isn't any other fix.
Maybe this hack will stay for a while... a warning says that it will disappear in AGP 10.x, but it's only 9.0.1 now.

side note: I've just changed the base branch to master in the hope it would trigger CI, but apparently it didn't.

[joebowbeer]

I suggest: create an issue for the workaround, and update the comment to refer to the issue.

The gradle.properties comment in this PR is oddly formatted, right?

https://localizely.com/java-properties-file/

Updating the comment should trigger a build.

[Ant1r]

oh oh :-)

[joebowbeer]

Can you verify that proguard w/optimization is not breaking anything?

By using proguard-android-optimize.txt, you enable R8 to perform its full suite of optimizations, leading to a smaller, faster, and more efficient application. Note that enabling optimization can sometimes introduce new runtime issues, requiring careful testing and potentially adding specific -keep or -optimizations rules to your custom proguard-rules.pro file.

[Ant1r]

well PdTest builds and runs normally.

[joebowbeer]

Looks good.

Do you want to bump the minor version to make a new snapshot?

[Ant1r]

Good idea. Even if API didn't change, if problems (e.g with proguard optimization) arise we can compare with 1.4.1.

[joebowbeer]

LGTM

[Ant1r]

FYI PdDroidParty compiles and runs fine with 1.4.2-SNAPSHOT :-)