Fix java version used by build_aar_module_test (flutter#154967)

Used the wrong syntax, whoops

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Co-authored-by: Gray Mackall <[email protected]>

Author: gmackall

.ci.yaml

@@ -434,7 +434,7 @@ targets:
         [
           {"dependency": "android_sdk", "version": "version:34v3"},
           {"dependency": "chrome_and_driver", "version": "version:125.0.6422.141"},
-          {"dependency": "open_jdk", "version": "17"}
+          {"dependency": "open_jdk", "version": "version:17"}
         ]
       tags: >
         ["devicelab","hostonly"]