Store string frros in a string pool and copy that pool to the idmap

Bug: 232940948
Test: manual with test app and added automated tests
Change-Id: I30f5efefff7cf4fb0869188be78cc08e8efe7f04
diff --git a/cmds/idmap2/tests/R.h b/cmds/idmap2/tests/R.h
index 89219c9..ad998b9 100644
--- a/cmds/idmap2/tests/R.h
+++ b/cmds/idmap2/tests/R.h
@@ -41,6 +41,7 @@
     constexpr ResourceId policy_system = 0x7f02000c;
     constexpr ResourceId policy_system_vendor = 0x7f02000d;
     constexpr ResourceId str1 = 0x7f02000e;
+    constexpr ResourceId str2 = 0x7f02000f;
     constexpr ResourceId str3 = 0x7f020010;
     constexpr ResourceId str4 = 0x7f020011;
   }  // namespace string