Bump CaptivePortalLogin package version code

The version code in the manifest is only used for development
builds, as release builds dynamically replace it.
To allow installing development builds on any platform, bump version
to 309999900.

Bug: 170183552
Change-Id: Ic81e6242d65b4fe3f6e2ac59accf245e14a6c704
Test: m
1 file changed