ANDROID: GKI: Add tracing_is_on interface into symbol list

The tracing_is_on interface has been exported, add it to the symbol table so that we can use it in the external module.

Leaf changes summary: 1 artifact changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 1 Added function
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

1 Added function:

  [A] 'function int tracing_is_on()'

Bug: 193384408

Signed-off-by: xieliujie <xieliujie@oppo.com>
Change-Id: If9f923850ab1db76214240efd8337211972d3a67