microdroid_manager uses kernlog

Bug: 189805435
Test: atest MicrodroidTestHostCases
adb shell into the VM and execute logcat

Change-Id: I2724773c237c4ae208671ee206896679488ba7da
diff --git a/microdroid_manager/src/main.rs b/microdroid_manager/src/main.rs
index 10731c5..9bcfa67 100644
--- a/microdroid_manager/src/main.rs
+++ b/microdroid_manager/src/main.rs
@@ -29,9 +29,7 @@
 const WAIT_TIMEOUT: Duration = Duration::from_secs(10);
 
 fn main() -> Result<()> {
-    // TODO(b/189805435) use kernlog
-    env_logger::init();
-
+    kernlog::init()?;
     info!("started.");
 
     let metadata = metadata::load()?;