MPEG4Writer: Increase duration between out of order frames

Bug: 128348228

Increased kMaxCTTSOffetTimeUs value from 1 second to 30 minutes as out of
order frames for use cases like LongShot can cause duration between two
frames to be more than several seconds.  Increased the max duration to
30 minutes as that constant is used only to keep CTTS values positive
in CTTS table.

Test: cts-tradefed run cts-dev -m CtsMediaTestCases --compatibility:module-arg \
      CtsMediaTestCases:include-annotation:\
      android.platform.test.annotations.RequiresDevice

Change-Id: I294b3086abb711e302a7a2a228da485bf9b90aac