Enable icache flushing for embedded builtins

Dev experiment shows it helps to mitigate crashes on some Android
devices.

Bug: chromium:889460,v8:11619
Change-Id: I8c836e82e93f6373724d66598448c2610ab188d4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2910775
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74707}

src/flags/flag-definitions.h

@@ -1594,7 +1594,7 @@ DEFINE_BOOL(
     "includes arguments for each function call in the error stack frames array")
 DEFINE_BOOL(adjust_os_scheduling_parameters, true,
             "adjust OS specific scheduling params for the isolate")
-DEFINE_BOOL(experimental_flush_embedded_blob_icache, false,
+DEFINE_BOOL(experimental_flush_embedded_blob_icache, true,
             "Used in an experiment to evaluate icache flushing on certain CPUs")
 
 // Flags for short builtin calls feature