Add static_libs support to android_app bp2build converter.

With this change we can allow list WifiDirectDemo, as its dependencies
happen to have manual BUILD file conversions.

Test: ./build/bazel/scripts/run_presubmits.sh
Change-Id: I68b4c2b129fe750913f013384c87a5332fdcc9b6

bp2build/android_app_conversion_test.go

@@ -66,7 +66,7 @@ func TestAndroidAppAllSupportedFields(t *testing.T) {
 			"resb/res.png":                 "",
 			"manifest/AndroidManifest.xml": "",
 		},
-		blueprint: `
+		blueprint: simpleModuleDoNotConvertBp2build("android_app", "static_lib_dep") + `
 android_app {
         name: "TestApp",
         srcs: ["app.java"],
@@ -74,6 +74,7 @@ android_app {
         package_name: "com.google",
         resource_dirs: ["resa", "resb"],
         manifest: "manifest/AndroidManifest.xml",
+        static_libs: ["static_lib_dep"]
 }
 `,
 		expectedBazelTargets: []string{
@@ -85,6 +86,7 @@ android_app {
         "resb/res.png",
     ]`,
 				"custom_package": `"com.google"`,
+				"deps":           `[":static_lib_dep"]`,
 			}),
 		}})
 }