[Refactor] Delegate tfNode creation to exporter

[Refactor] Delegate tfNode creation to exporter

This patch enables delegating exporting logic to exporter.
Note that this is supposed to be 1:1 mapping, if it has to be m:n
mapping, it should be directly handled by the interpreter, which
actually can see the node.

Also s/`save_result`/`saveResult` and `get_result`/`getResult`

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

Signed-off-by: Jihoon Lee <jhoon.it.lee@samsung.com>
[Android] Add tflite interpreter option

This patch add tflite interpreter option to ndk build

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

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