Make check for ANDROIDX_PROJECT==kmp not case sensitive

Test: Manually checked ./studiow kmp and builds on CI should still pass
Change-Id: I78fd32585f54f6a0cf5c64af84168310383f3c19

Author: fsladkey

buildSrc/public/src/main/kotlin/androidx/build/Multiplatform.kt

@@ -39,7 +39,7 @@ class Multiplatform {
          */
         @JvmStatic
         fun isKotlinNativeEnabled(project: Project): Boolean {
-            return System.getenv()["ANDROIDX_PROJECTS"] == "KMP" ||
+            return "KMP".equals(System.getenv()["ANDROIDX_PROJECTS"], ignoreCase = true) ||
                 StudioType.isPlayground(project) ||
                 project.providers.gradleProperty("androidx.kmp.native.enabled")
                     .orNull?.toBoolean() == true