Refactor Android init methods for more flexibility #986

Job	Run time
Clippy (-Zbuild-std)	1m 6s
Clippy (stable) (ubuntu-latest)	1m 9s
Test (ubuntu-latest)	35s
Clippy (MSRV) (ubuntu-latest)	1m 0s
Test (Android)	4m 51s
Clippy (stable) (macos-latest)	34s
Test (macos-latest)	26s
Clippy (MSRV) (macos-latest)	1m 4s
Clippy (stable) (windows-latest)	1m 30s
Test (windows-latest)	2m 13s
Clippy (MSRV) (windows-latest)	1m 47s
Test iOS (Catalyst)	19s
Test (FreeBSD)	2m 8s
Ktlint	1m 10s
Check for documentation errors	27s
Rustfmt	4s
Check semver compatibility	26s
Verify Android artifacts	1m 40s
	22m 29s

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