stdlib: Add freq and idle state CPU slices

Adds new files under cpu/freq.sql and cpu/idle.sql that respectively
correspond to every frequency change or every idle state change on every
CPU.

Bug: 329507878
Change-Id: I86571bac470bae31caf770f8d514caf97f92bc1d
Signed-off-by: Samuel Wu <wusamuel@google.com>
diff --git a/BUILD b/BUILD
index b5ce58d..b6888b5 100644
--- a/BUILD
+++ b/BUILD
@@ -2466,6 +2466,8 @@
     name = "src_trace_processor_perfetto_sql_stdlib_cpu_cpu",
     srcs = [
         "src/trace_processor/perfetto_sql/stdlib/cpu/cpus.sql",
+        "src/trace_processor/perfetto_sql/stdlib/cpu/freq.sql",
+        "src/trace_processor/perfetto_sql/stdlib/cpu/idle.sql",
         "src/trace_processor/perfetto_sql/stdlib/cpu/size.sql",
     ],
 )