Allow crashCommand for tombstone to fail

Because the crash command is meant to "crash" microdroid, it can
sometimes fail (due to adbd exiting too early). Using tryRun can reduce
flakiness.

Test: atest MicrodroidHostTests
Change-Id: I45e4f578d6ea62bc6bb7b29b3b36221738b5f9cc

tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java

diff --git a/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java b/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
index 2cd4577..0810ce0 100644
--- a/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
+++ b/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
@@ -552,7 +552,8 @@
         mMicrodroidDevice.enableAdbRoot();
 
         CommandRunner microdroid = new CommandRunner(mMicrodroidDevice);
-        microdroid.run(crashCommand);
+        // can crash in the middle of crashCommand; fail is ok
+        microdroid.tryRun(crashCommand);
 
         // check until microdroid is shut down
         waitForCrosvmExit(android, testStartTime);