Update test key for signing APK payloads

For now apkverify doesn't support DSA key algorithm. Replacing test keys
for CompOS APK and MicrodroidTestApp APK with RSA keys.

The new keystore was created by `keytool ... -keyalg RSA -keysize 2048
-validity 10000`.

Bug: 197052981
Test: MicrodroidHostTestsCases
Change-Id: I3ad59d59d903edc2c8fb960fd001f3cfca1e599f
diff --git a/compos/apk/test.keystore b/compos/apk/test.keystore
index 2f024d8..2946641 100644
--- a/compos/apk/test.keystore
+++ b/compos/apk/test.keystore
Binary files differ
diff --git a/microdroid_manager/src/main.rs b/microdroid_manager/src/main.rs
index fa456e8..d7e256b 100644
--- a/microdroid_manager/src/main.rs
+++ b/microdroid_manager/src/main.rs
@@ -40,8 +40,8 @@
     let metadata = metadata::load()?;
 
     if let Err(err) = verify_payloads() {
-        error!("failed to verify payload: {}", err);
-        // TODO(jooyung): should stop the boot process if verification fails
+        error!("failed to verify payload: {:#?}", err);
+        return Err(err);
     }
 
     if !metadata.payload_config_path.is_empty() {
diff --git a/tests/testapk/test.keystore b/tests/testapk/test.keystore
index 2f024d8..2946641 100644
--- a/tests/testapk/test.keystore
+++ b/tests/testapk/test.keystore
Binary files differ