Add min_sdk for MP tests

Without this, when built on a dev branch, soong will "fix" the manifest
to make APKs uninstallable on other branches. (from aosp/1622433)

Bug: 182006284
Test: atest
Change-Id: I4c59918f9cbc13b894da89b4f35133b0c9591c62
diff --git a/libs/install/Android.bp b/libs/install/Android.bp
index fcb7051..e344bdd 100644
--- a/libs/install/Android.bp
+++ b/libs/install/Android.bp
@@ -168,6 +168,7 @@
     static_libs: [
         "cts-install-lib-java",
     ],
+    min_sdk_version: "30",
 }
 
 java_library_host {