In DRM framework, plugins can transmit DrmInfoEvent to Java layer.
Although DrmInfoEvent has several entries, current implementation
can only convey integer and String. This change enables plugins
uto propagate a hashmap to Java layer. The hashmap can have
one or more Strings and one byte array as value.
Changes are made by Sony Corporation.
bug: 10459159
Change-Id: I5f2bfb43b676863ef4d220fd4ef1e48777e92752
(cherry picked from commit 84a5b5cab40711e20ba70c5ed4dfeab6b558b53b)
6fd97b7d93