Add methods to deconstruct SDK_INT_FULL

Add methods to deconstruct SDK_INT_FULL into major and minor versions.

Bug: 350458259
Test: atest 'CtsOsTestCases:BuildTest#testGetMajorSdkVersion' 'CtsOsTestCases:BuildTest#testGetMinorSdkVersion'
Flag: android.sdk.major_minor_versioning_scheme
Change-Id: Icb1cdd1155b10cd1efab395bea95c4ec2c6dbb93
2 files changed