Increase compos default memory

Bisected the minimum required memory.
* 584: OK
* 581: FAILED

Bug: N/A
Test: atest ComposBenchmarkApp:com.android.compos.benchmark.ComposBenchmark#testGuestCompileTime
Change-Id: I149405c149a7184e9078f9a26482d761c36471a8

compos/composd/src/instance_manager.rs

diff --git a/compos/composd/src/instance_manager.rs b/compos/composd/src/instance_manager.rs
index d7c0f9a..510ad11 100644
--- a/compos/composd/src/instance_manager.rs
+++ b/compos/composd/src/instance_manager.rs
@@ -90,7 +90,7 @@
 fn compos_memory_mib() -> Result<i32> {
     // Enough memory to complete odrefresh in the VM, for older versions of ART that don't set the
     // property explicitly.
-    const DEFAULT_MEMORY_MIB: u32 = 400;
+    const DEFAULT_MEMORY_MIB: u32 = 600;
 
     let art_requested_mib =
         read_property("composd.vm.art.memory_mib.config")?.unwrap_or(DEFAULT_MEMORY_MIB);