Refactor: define oom_score_adj span once

Introduce new process_oom_score.adj that defines oom_score_span view
that can be used by android_lmk.sql and process_mem.sql.

Bug: 144281172
Change-Id: I1a91b29a309349994e6ee45c1bf9ea7fa7427cd5
diff --git a/Android.bp b/Android.bp
index 2c974c1..49b651e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -36,6 +36,7 @@
     "src/trace_processor/metrics/android/mem_stats_priority_breakdown.sql",
     "src/trace_processor/metrics/android/process_mem.sql",
     "src/trace_processor/metrics/android/process_metadata.sql",
+    "src/trace_processor/metrics/android/process_oom_score.sql",
     "src/trace_processor/metrics/android/process_unagg_mem_view.sql",
     "src/trace_processor/metrics/android/span_view_stats.sql",
     "src/trace_processor/metrics/android/unsymbolized_frames.sql",