Camera: Add metrics collection for FPS range

- Add new misc analytics flag for 24q3
- Add collection of most common FPS range requested by client
- Add tests for FPS histogram
  - Clean up unit test build files so that a source file doesn't have to be
    listed twice

Bug: 324485285
Test: New unit tests pass, camera CTS, manual checking of new metrics logging
Change-Id: I0e76b0f7c4a2e41e2a160051bba12d54e6fd480b
diff --git a/camera/camera_platform.aconfig b/camera/camera_platform.aconfig
index 18543d6..4fcceae 100644
--- a/camera/camera_platform.aconfig
+++ b/camera/camera_platform.aconfig
@@ -210,3 +210,10 @@
        purpose: PURPOSE_BUGFIX
      }
 }
+
+flag {
+     namespace: "camera_platform"
+     name: "analytics_24q3"
+     description: "Miscellaneous camera platform metrics for 24Q3"
+     bug: "332557570"
+}