[Profiler] Add basic profilerlistener

[Profiler] Add basic profilerlistener

This patch adds global profiler listener for various purpose

From this patch,
1. Profiler can called globally with designated event key
2. Listener reporting suite included
3. Enum key has changed to int key to deal with unhashable
key compile error in few platforms.

**Self evaluation:**
1. Build test: [X]Passed [ ]Failed [ ]Skipped
2. Run test: [X]Passed [ ]Failed [ ]Skipped

v2)
1. Change listener to RAII object (with forcing profiler, event
designation)
2. Add unsubscribe method
3. Change event register to set to prevent notifying a listener twice
4. Change semintics to not allow adding same listener twice

Signed-off-by: Jihoon Lee <jhoon.it.lee@samsung.com>