Convert hostsidetests/appsecurity/test-apps/**/Android.mk files to Android.bp

Also, fix numerous cases where test applications
('android_test_helper_app') were declared as tests ('android_test').
See build/soong/README.md for more information.

Bug: 122332514
Test: atest CtsAppSecurityHostTestCases
Change-Id: I5f4ea4843dd57019b0c2c5b0fe16fbbdbe97e0bf
diff --git a/hostsidetests/appsecurity/test-apps/SimpleAppInstallDiffCert/Android.bp b/hostsidetests/appsecurity/test-apps/SimpleAppInstallDiffCert/Android.bp
index a427def..64005a0 100644
--- a/hostsidetests/appsecurity/test-apps/SimpleAppInstallDiffCert/Android.bp
+++ b/hostsidetests/appsecurity/test-apps/SimpleAppInstallDiffCert/Android.bp
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-android_test {
+android_test_helper_app {
     name: "CtsSimpleAppInstallDiffCert",
     defaults: ["cts_support_defaults"],
     srcs: ["src/**/*.java"],