Rename CacheLocation to Paths.

We have a general need for overriding more paths (e.g. "/tmp"), mostly
for testing purpose. Rename CacheLocation to Paths, and use that to
manage TEMPORARY_{INSTALL,LOG}_FILE.

Test: mmma -j bootable/recovery
Test: recovery_component_test
Change-Id: Ia8ce8e5695df37ca434f13ac4d3206de1e8e9396
diff --git a/otautil/Android.bp b/otautil/Android.bp
index 75cf691..958f98b 100644
--- a/otautil/Android.bp
+++ b/otautil/Android.bp
@@ -21,7 +21,7 @@
         "SysUtil.cpp",
         "DirUtil.cpp",
         "ThermalUtil.cpp",
-        "cache_location.cpp",
+        "paths.cpp",
         "rangeset.cpp",
     ],