Fix type of _id col in SearchableDictionary

SDK SAMPLE CODE ONLY

Before, the _id column in the search suggestions contained
a string. This causes an exception when the suggestion provider
is used for in-app search in Cupcake. Now the _id column contains
a long instead.

Fixes http://b/issue?id=2219970

Change-Id: I53c8228badbb0e3ff1799107490b44ff8ced7148
1 file changed