stdlib: Refactor Wattson s/ungrouped.sql/estimates.sql

Clean up file name to be more immediately understandable for what the
module's intended to do.

Bug: 370829192
Test: tools/diff_test_trace_processor.py out/linux/trace_processor_shell --name-filter '.*wattson.*'
Change-Id: If285ae881e27c862df2ea5082b81ec3d292fe477
Signed-off-by: Samuel Wu <wusamuel@google.com>
diff --git a/Android.bp b/Android.bp
index 44b5ec5..ffa415a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -13667,8 +13667,8 @@
         "src/trace_processor/perfetto_sql/stdlib/wattson/cpu_idle.sql",
         "src/trace_processor/perfetto_sql/stdlib/wattson/cpu_split.sql",
         "src/trace_processor/perfetto_sql/stdlib/wattson/curves/device.sql",
+        "src/trace_processor/perfetto_sql/stdlib/wattson/curves/estimates.sql",
         "src/trace_processor/perfetto_sql/stdlib/wattson/curves/idle_attribution.sql",
-        "src/trace_processor/perfetto_sql/stdlib/wattson/curves/ungrouped.sql",
         "src/trace_processor/perfetto_sql/stdlib/wattson/curves/utils.sql",
         "src/trace_processor/perfetto_sql/stdlib/wattson/device_infos.sql",
         "src/trace_processor/perfetto_sql/stdlib/wattson/system_state.sql",