virtmgr: Add boost_uclamp

To ensure consistent results during testing, passes the boost_uclamp
as a hint to the host scheduler to reduce variance and set
a mininum floor for performance.

Also enable boost_uclamp for Microdroid Boot tests,
partially authored by ioffe.

Bug: 342349882
Test: Booted a VM and checked uClamp
Change-Id: I0d40163515d1a4e41bde6cc81916de51f798813c
Signed-off-by: David Dai <davidai@google.com>
diff --git a/vm/src/main.rs b/vm/src/main.rs
index 390a60d..a250c35 100644
--- a/vm/src/main.rs
+++ b/vm/src/main.rs
@@ -65,6 +65,10 @@
     #[cfg(network)]
     #[arg(short, long)]
     network_supported: bool,
+
+    /// Boost uclamp to stablise results for benchmarks.
+    #[arg(short, long)]
+    boost_uclamp: bool,
 }
 
 impl CommonConfig {