Make the time zone test1 APEX uninstallable

Make the time zone test1 APEX uninstallable so that it won't be
put in the /system image alongside the real one - it's only intended
for use during tests.

Bug: 120960303
Test: build only
Change-Id: Iebbd1e42c60c984eac9868ae15c58e82c838507f
diff --git a/testing/data/test1/apex/Android.bp b/testing/data/test1/apex/Android.bp
index d8af5cf..d7b58fd 100644
--- a/testing/data/test1/apex/Android.bp
+++ b/testing/data/test1/apex/Android.bp
@@ -27,5 +27,9 @@
         "apex_icu_tzdata.dat_test1",
     ],
     key: "apex.tzdata.key",
+
+    // installable: false as we do not want test APEX versions in the system
+    // image.
+    installable: false,
 }