Trace Redaction - Consolidate Modifiers

Pull all modifiers into one file. The only modifiers that were not
pulled into the new file are the ones that are specific to the
process tree.

Change-Id: I74fe9180eb785c17f29d70518cf303e264e2d466
diff --git a/Android.bp b/Android.bp
index 2b9993f..45eb6ad 100644
--- a/Android.bp
+++ b/Android.bp
@@ -13610,6 +13610,7 @@
         "src/trace_redaction/filter_packet_using_allowlist.cc",
         "src/trace_redaction/filtering.cc",
         "src/trace_redaction/find_package_uid.cc",
+        "src/trace_redaction/modify.cc",
         "src/trace_redaction/modify_process_trees.cc",
         "src/trace_redaction/populate_allow_lists.cc",
         "src/trace_redaction/process_thread_timeline.cc",