Fix to double deletion of StreamingZipInflater object.

Race condition can cause double deletion during stability runs
of StreamingZipInflater object. This is possible due to delete
of mZipInflater occuring at two seperate locations in owning
_CompressedAsset object. Fixed by securing object is set to
null on member reference before calling delete. Also secured
that all deleted objects in StreamingZipInflater are set to
null after delete.

Change-Id: I87ef0fa78835ea05c524b3d818c8e6aa2aee1fe4
Themes: Add ability to apply color filters to composed icons

Themes can include one or more of the following filter tags in
assets/icons/res/xml/appfilter.xml

    <!-- HUE filter
         Integer value between -180 and 180 representing the degree.
         0 = no change
    -->
    <filter name="hue">0</filter>

    <!-- SATURATION filter.
         0 = grayscale, 100 = no change, 200 = over saturated
    -->
    <filter name="saturation">0</filter>

    <!-- BRIGHTNESS filter.
         0 = pitch black, 100 = no change, 200 = 200% brightness
    -->
    <filter name="brightness">100</filter>

    <!-- CONTRAST filter.
         -100 = minimal contrast, 0 = no change, 100 = maximum contrast
    -->
    <filter name="contrast">100</filter>

    <!-- ALPHA filter.
         0 = transparent, 100 = opaque
    -->
    <filter name="alpha">75</filter>

    <!-- INVERT filter.
         Valid values are true or false
         true = invert colors
    -->
    <filter name="invert">false</filter>

    <!-- TINT filter.
         A hexadecimal value representing ARGB
    -->
    <filter name="tint">#ff0000ff</filter>

Change-Id: I2431237dd2766176be16c730020557ce87d623e4