Relax length restriction on meta-data values.

Current restrictions on the value attribute of the <meta-data> tag in
the manifest is preventing some legitimate apps from being installed.
Relaxing this restriction fix this. This will be followed up with a new
restriction based on the total size of all meta-data values per
component.

Bug: 309027507
Test: atest AndroidPackageParsingValidationTest
Change-Id: Ic1dfdf10e4b4ec460dc56a762649ccd15235dd63