Android: Inline *AndroidBuildApkStep::findInBuild() into callers

This is an unusual and unneeded indirection.

Change-Id: If0e241364899555f5fe6e07fed38f440bbf2812b
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/android/androidbuildapkstep.cpp

@@ -134,15 +134,6 @@ AndroidBuildApkStep::AndroidBuildApkStep(BuildStepList *parent)
     setImmutable(true);
 }
 
-AndroidBuildApkStep *AndroidBuildApkStep::findInBuild(const BuildConfiguration *bc)
-{
-    if (!bc)
-        return nullptr;
-    BuildStepList *bsl = bc->buildSteps();
-    QTC_ASSERT(bsl, return nullptr);
-    return bsl->firstOfType<AndroidBuildApkStep>();
-}
-
 bool AndroidBuildApkStep::init()
 {
     ProjectExplorer::BuildConfiguration *bc = buildConfiguration();